US20090032775A1 - Polycrystalline conducting polymers and precursors thereof having adjustable morphology and properties - Google Patents
Polycrystalline conducting polymers and precursors thereof having adjustable morphology and properties Download PDFInfo
- Publication number
- US20090032775A1 US20090032775A1 US12/137,646 US13764608A US2009032775A1 US 20090032775 A1 US20090032775 A1 US 20090032775A1 US 13764608 A US13764608 A US 13764608A US 2009032775 A1 US2009032775 A1 US 2009032775A1
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- Prior art keywords
- acid derivatives
- derivatives
- additive
- degree
- polymer
- Prior art date
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- 239000002243 precursor Substances 0.000 title claims abstract description 46
- 239000002322 conducting polymer Substances 0.000 title description 47
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Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G61/00—Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule
- C08G61/12—Macromolecular compounds containing atoms other than carbon in the main chain of the macromolecule
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
- H01B1/124—Intrinsically conductive polymers
- H01B1/128—Intrinsically conductive polymers comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249955—Void-containing component partially impregnated with adjacent component
- Y10T428/249958—Void-containing component is synthetic resin or natural rubbers
Definitions
- the present invention is directed to polycrystalline electrically conductive polymer precursors and polycrystalline conducting polymers having adjustable morphology and properties.
- Electrically conductive organic polymers emerged in the 1970's as a new class of electronic materials. These materials have the potential of combining the electronic and magnetic properties of metals with the light weight, processing advantages, and physical and mechanical properties characteristic of conventional organic polymers.
- Examples of electrically conducting polymers are polyparaphenylene vinylenes, polyparaphenylenes, polyanilines, polythiophenes, polyazines, polyfuranes, polythianaphthenes polypyrroles, polyselenophenes, poly-p-phenylene sulfides, polyacetylenes formed from soluble precursors, combinations thereof and blends thereof with other polymers and copolymers of the monomers thereof.
- These polymers are conjugated systems which are made electrically conducting by doping.
- the doping reaction can involve an oxidation, a reduction, a protonation, an alkylation, etc.
- the non-doped or non-conducting form of the polymer is referred to herein as the precursor to the electrically conducting polymer.
- the doped or conducting form of the polymer is referred to herein as the conducting polymer.
- Conducting polymers have potential for a large number of applications in such areas such as electrostatic charge/discharge (ESC/ESD) protection, electromagnetic interference (EMI) shielding, resists, electroplating, corrosion protection of metals, and ultimately metal replacements, i.e. wiring, plastic microcircuits, conducting pastes for various interconnection technologies (solder alternative), etc.
- ESC/ESD electrostatic charge/discharge
- EMI electromagnetic interference
- resists resists
- electroplating electroplating
- corrosion protection of metals i.e. wiring, plastic microcircuits, conducting pastes for various interconnection technologies (solder alternative), etc.
- solder alternative solder alternative
- polyacetylene exhibits the highest conductivity of all the conducting polymers.
- polyacetylene can be synthesized in a highly crystalline form (crystallinity as high as 90% has been achieved) (as reported in Macromolecules, 25, 4106, 1992).
- This highly crystalline polyacetylene has a conductivity on the order of 10.sup.5 S/cm.
- this conductivity is comparable to that of copper, polyacetylene is not technologically applicable because it is a non-soluble, non-processible, and environmentally unstable polymer.
- the polyaniline class of conducting polymers has been shown to be probably the most suited of such materials for commercial applications. Great strides have been made in making the material quite processable.
- the conductivity (a) is dependent on the number of carriers (n) set by the doping level, the charge on the carriers (q) and on the interchain and intrachain mobility ( ⁇ ) of the carriers.
- n the number of carriers in these systems is maximized and thus, the conductivity is dependent on the mobility of the carriers.
- the mobility in turn, depends on the morphology of the polymer.
- the intrachain mobility depends on tile degree of conjugation along the chain, presence of defects, and on the chain conformation.
- the interchain mobility depends on the interchain interactions, the interchain distance, the degree of crystallinity, etc.
- Increasing the crystallinity results in increased conductivity as examplified by polyacetylene. To date, it has proven quite difficult to attain polyaniline in a highly crystalline state. Some crystallinity has been achieved by stretch orientation or mechanical deformation (A. G.
- a broad aspect of the present invention is a polycrystalline material comprising crystallites of a precursor to an electrically conductive polymer and/or an electrical conductive polymer.
- the intersticial regions between the crystallites contain amorphous material.
- the amorphous regions of the material contain the additive.
- FIG. 1 is a general formula for polyaniline in the non-doped or precursor form.
- FIG. 2 is a general formula for a doped conducting polyaniline.
- FIG. 3 is a general formula for the polysemiquinone radical cation form of doped conducting polyaniline.
- FIG. 4 is a Gel Permeation Chromatograph (GPC) of polyaniline base in NMP (0.1%): GPC shows a trimodal distribution—A very high molecular weight fraction (approx. 12%) and a major peak having lover molecular weight.
- Curve 5 ( a ) is a Wide Angle-X-Ray Scattering (WAXS) spectrum for a polyaniline base film processed from NMP. The polymer film is essentially amorphous.
- Curve 5 ( b ) is a Wide Angle X-Ray Scattering spectrum for a polyaniline base film that has stretch-oriented (I/Io-3.7). This film was derived from a gel.
- Curve 5 ( c ) is a Wide Angle-X-Ray Scattering spectrum for a polyaniline-base film containing 10% poly-co-dimethyl propylamine siloxane. This film is highly crystalline.
- FIG. 6 is a Schematic diagram of a polycrystalline material as taught in present invention having crystalline regions (outlined in (dotted rectangles) with intersticial amorphous regions
- FIG. 7 is a Dynamic Mechanical Thermal Analysis (DMTA) plot for polyaniline base film cast from NMP. (First Thermal Scan; under Nitrogen).
- DMTA Dynamic Mechanical Thermal Analysis
- FIG. 8 is a DMTA plot which represents the second thermal scan for a polyaniline base film cast from NMP; This same film was previously scanned as shown in FIG. 7 . Film Contains no residual solvent.
- FIG. 9 is a DMTA plot for polyaniline base film cast from NMP and containing 5% poly-co-dimethyl aminopropyl siloxane (5% N content). First Thermal Scan.
- FIG. 10 is a DMTA plot for polyaniline base film cast from NMP and containing 5% poly-co-dimethyl aminopropyl siloxane (5% N content). Second Thermal Scan (this same film was previously scanned as shown in FIG. 9 ) Film Contains no residual solvent.
- FIG. 11 is a GPC for a polyaniline base solution in NMP containing 5% poly-co-dimethyl aminopropyl siloxane by weight to polyaniline.
- the polyaniline was 0.1% in NMP.
- the present invention is directed toward electrically conducting polymer precursors and conducting polymers having adjustable morphology and in turn adjustable physical, and electrical properties.
- the present invention is also directed toward controlling and enhancing the 3-dimensional order or crystallinity of conducting polymer precursors and of conducting polymers.
- the present invention is directed towards enhancing the electrical conductivity of conducting polymers. This is done by forming an admixture of an electrically conducting polymer precursor or an electrically conducting polymer with an additive whereby the additive provides local mobility to the molecules so as to allow the conducting polymer precursor or conducting polymer chains to associate with one another and achieve a highly crystalline state.
- An example of such an additive is a plasticizer.
- a plasticizer is a substance which when added to a polymer, solvates the polymer and increases its flexibility, deformability, generally decreases the glass transition temperature Tg, and generally reduces the tensile modulus.
- the addition of a plasticizer may induce antiplasticization, that is an increase in the modulus or stiffness of the polymer, an increase in Tg.
- the additives can provide a plasticization effect, an antiplasticization effect or both effects.
- polymers which can be used to practice the present invention are of substituted and unsubstituted homopolymers and copolymers of aniline, thiophene, pyrrole, p-phenylene sulfide, azines, selenophenes, furans, thianaphthenes, phenylene vinylene, etc.
- polyparaphenylenes polyparaphenylevevinylenes, polyanilines, polyazines, polythiophenes, poly-p-phenylene sulfides, polyfuranes, polypyrroles, polythianaphthenes, polyselenophenes, polyacetylenes formed from soluble precursors and combinations thereof and copolymers of monomers thereof.
- the general formula for these polymers can be found in U.S. Pat. No. 5,198,153 to Angelopoulos et al. While the present invention will be described with reference to a preferred embodiment, it is not limited thereto.
- One type of polymer which is useful to practice the present invention is a substituted or unsubstituted polyaniline or copolymers of polyaniline having general formula shown in FIG. 1 wherein each R can be H or any organic or inorganic radical; each R can be the same or different; wherein each R.sup.1 can be H or any organic or inorganic radical, each R.sup.1 can be the same or different; x.gtoreq.1; preferable x.gtoreq.2 and y has a value from 0 to 1.
- organic radicals are alkyl or aryl radicals.
- examples of inorganic radicals are Si and Ge.
- the most preferred embodiment is emeraldine base form of the polyaniline wherein y has a value of approximately 0.5.
- the base form is the non-doped form of the polymer.
- the non-doped form of polyaniline and the non-doped form of the other conducting polymers is herein referred to as the electrically conducting polymer precursor.
- polyaniline is shown doped with a dopant.
- the polymer is in the conducting form. If the polyaniline base is exposed to cationic species QA, the nitrogen atoms of the imine (electron rich) part of the polymer becomes substituted with the Q+ cation to form an emeraldinie salt as show in FIG. 2 .
- Q+ can be selected from H+ and organic or inorganic cations, for example, an alkyl group or a metal.
- QA can be a protic acid where Q hydrogen.
- a protic acid HA
- HA a protic acid
- the emeraldine base form is greatly stalbilized by resonance effects.
- the charges distribute through the nitrogen atoms and aromatic rings making the imine and amine nitrogens indistinguishable.
- the actual structure of the doped form is a delocalized polysemiquinone radical cation as shown in FIG. 3 .
- the emeraldine base form of polyaniline is soluble in various organic solvents and in various aqueous acid solutions.
- organic solvents are dimethylsulfoxide (DMSO), dimethylformamide (DMF) and N-methylpyrrolidinone (NMP), dimethylene propylene urea, tetramethyl urea, etc. This list is exemplary only and not limiting.
- aqueous acid solutions is 80% acetic acid and 60-88% formic acid. This list is exemplary only and not limiting.
- Polyaniline base is generally processed by dissolving the polymer in NMP. These solutions exhibit a bimodal or trimodal distribution in Gel Permeation Chromatography (GPC) as a result of aggregation induced by internal hydrogen bonding between chains as previously described in U.S. patent application Ser. No. 08/370,128, filed on Jan. 9, 1995, the teaching of which is incorporated herein by reference.
- GPC Gel Permeation Chromatography
- Polymers in general can be amorphous, crystalline, or partly crystalline. In the latter case, the polymer consists of crystalline phases and amorphous phases.
- the morphology of a polymer is very important in determining the polymer's physical, mechanical, and electronic properties.
- WAXS Wide Angle X-Ray Scattering
- amorphous polyaniline base films (those having structure shown in FIG. 5 a ) with aqueous hydrochloric acid results in isotropic conductivity of 1 S/cm. Such films are not crystalline. Similar doping of stretch oriented films results in anisotropic conductivity where conductivity on the order of 10.sup.2 S/cm is measured parallel to the stretch direction whereas conductivity on the order of 10.sup.0 S/cm is measured perpendicular to the stretch direction. It should also be noted that some level of crystallinity is lost during the doping process in these films.
- the interchain (polymer chain) registration is increased as compared to a stretch oriented film.
- FIGS. 7 and 8 show the dynamic mechanical thermal analysis (DMTA) spectrum for a polyaniline base film processed from NMP alone.
- FIG. 7 is the first scan where a Tg of approx. 118 is observed as a result of the residual NMP which is present in the film.
- FIG. 8 is the second thermal scan of the same film. This film has no residual solvent and a Tg of .congruent.251.degree. C. is measured for the polyaniline base polymer.
- DMTA dynamic mechanical thermal analysis
- the siloxane has a polar amine group which facilitates the miscibility of the polyaniline base and the plasticizer.
- the DMTA of a polyaniline base film cast from NMP and containing 55 by weight to polyaniline of the poly-co-dimethyl propyl amine siloxane exhibits a lower Tg on the first thermal scan as compared to polyaniline base processed from NMP alone ( FIG. 9 ) as a result of plasticization induced by the siloxane. However, on the second thermal scan of this film ( FIG.
- the polymer exhibits an increase in Tg as compared to polyaniline processed from NMP.
- the siloxane due to the polar amine group can interact with the polymer chains and disrupt some of the polyaniline interactions with itself or some of the aggregation.
- the polysiloxane first induces some deaggregation.
- the polysiloxane has multiple amine sites and thus, it can itself hydrogen bond with multiple polyaniline base chains and thus, the polysiloxane facilitates the formation of a cross-linked network. This cross-linked network accounts for the increased Tg observed in the DMTA.
- Tg is characteristic of the amorphous regions of a polymer and in this case the amorphous regions consist of a cross-linked polyaniline/polysiloxane network.
- the polysiloxane is inducing an antiplasticization effect in polyaniline base as the Tg is increased.
- plasticizers reduce Tg.
- GPC data FIG. 11 ) is consistent with this model.
- the addition of the poly-amino containing siloxane to a polyaniline base solution in NMP results in a significant increase in the high molecular weight fractions depicting the cross-linked network which forms between polyaniline and the plasticizer.
- FIG. 5 c shows the WAXS for a polyaniline base film processed from NMP containing 10% of the poly amino containing siloxane. As can be seen highly crystalline polyaniline has bee attained. Much higher levels of crystallinity as compared to FIG. 5 b for the stretch oriented films.
- polyaniline by the addition of the siloxane forms a structure depicted in FIG. 6 where crystalline regions of highly associated polyaniline chains (outlined by a rectangle) are formed with intersticial amorphous regions.
- the additive resides in the amorphous intersticial sites.
- the degree of crystallinity (number of crystalline sites) and the size of the crystalline domains as well as the degree of amorphous regions and the nature of the amorphous region (aggregated, i.e. cross-linked or not) can be tuned by the type and amount of additive. In turn, by controlling the above, the properties of the material can also be controlled.
- the siloxane content becomes high enough that it disrupts the polyaniline base interactions in the crystalline regions.
- the poly co dimethyl aminopropyl siloxanes having 0.5 and 13% N ratios, similar trends are observed but the particular amount of siloxane needed to have a plasticization effect or an antiplasticization effect varies.
- the degree of crystallinity and the degree of amorphous regions and in turn the properties of polyaniline can be tuned by the nature of the additive as well as the amount of additive. Indeed, using the same additive but simply changing the loading dramatically changes the morphology and in turn the properties of polyaniline. electronic properties of the polymer are also impacted.
- the conductivity of a polyaniline base film cast from NMP and containing 1% by weight poly-co-dimethyl aminopropyl siloxane which is doped by aqueous hydrochloric acid is 50 S/cm as compared to 1 S/cm for a polyaniline film with no plasticizer. This is isotropic conductivity.
- the doped film containing the polysiloxane retains the highly crystalline structure.
- the degree of crystallinity and the degree of amorphous regions and in turn the physical, mechanical, and electronic properties can be tuned by the particular additive used and by the amount of additive.
- the Tg of polyaniline can be increased or decreased by the amount and type of additive.
- the mechanical properties such as tensile properties, modulus, impact resistance, etc. can be tuned as described above.
- the additive can range from 0.001 to 90% by weight, more preferably from 0.001 to 50% and most preferably from 0.001 to 25%.
- a list of plasticizers that can be used to practice the present invention is given in Table 1.
- the additive can also be removed from the final film structure if so desired by appropriate extraction.
- Polyaniline Synthesis Polyaniline is synthesized by the oxidative polymerization of aniline using ammonium peroxydisulfate in aqueous hydrochloric acid. The polyaniline hydrochloride precipitates from solution. The polymer is then neutralized using aqueous ammonium hydroxide. The neutralized or non-dope polyaniline base is then filtered, washed and dried. Polyaniline can also be made by electrochemical oxidative polymerization as taught by W. Huang, B. Humphrey, and A. G. MacDiarmid, J. Chem. Soc., Faraday Trans. 1, 82, 2385, 1986.
- the polyaniline base powder is readily dissolved in NMP up to 5% solids.
- Thin films (on the order of a micron) can be formed by spin-coating. Thick films are made by solution casting and drying (70.degree. C. in vacuum oven under a nitrogen purge for 15 hours). These solutions and films have the properties described above.
- Polyaniline Base was first dissolved in NMP to 5% solids and allowed to mix well.
- a poly-co-dimethyl, aminopropyl siloxane (N content 5% relative to repeat unit) was dissolved to 5% in NMP.
- the siloxane solution was added to the polyaniline base solution.
- the resulting admixture was allowed to mix for 12 hours at room temperature.
- a number of solutions were made having from 0.001% to 50% siloxane content (by weight relative to polyaniline).
- Thin films were spin-coated onto quartz substrates; Thick films were prepared by solution casting and baking the solutions at 70.degree. C. in a vacuum oven under a Nitrogen purge for 15 hours). The solutions and the films have the properties described above.
- Polyaniline Base was dissolved in m-Cresol and in NMP/m-Cresol combinations to 5% solids.
- the m-Cresol in the latter system being the additive ranged from 1 to 99%.
- Free-Standing films were made by solution casting techniques. With increasing m-cresol content, the polyaniline exhibited a WAXS similar to that shown in FIG. 5 a except that the amorphous scattering peak became somewhat sharper indicative of some crystallinity. However, this was significantly less than observed with the siloxane plasticizer.
- Polyaniline base films made as described above were doped by aqueous acid solutions of hydrochloric or methanesulfonic acid. The films were immersed in the acid solution for 12 hours for thin films and 36 hours for the thick films.
- the conductivity of a polyaniline base film processed from NMP and doped with these acid solutions is 1 S/cm
- the conductivity of a base film processed from NMP and 1% poly-co-dimethyl, aminopropyl siloxane (5% N content) was 50 S/cm.
- Polyaniline Base was dissolved in a solvent such as NMP or NMP/m-Cresol combinations, etc. from 1 to 5% solids.
- a dopant such camphorsulfonic acid or acrylamidopropanesulfonic acid (previously reported in U.S. patent application Ser. No. 595,853 filed on Feb. 2, 1996). These solutions were used to spin-coat or solution cast films.
- the plasticizer such as the poly-co-dimethyl, aminopropyl siloxane in a solvent was added to the doped polyaniline solution.
- the plasticizer was first added to the pani base solution. The dopant was then added to the polyaniline solution containing the plasticizer.
Abstract
Description
- This application is a DIV of Ser. No. 09/727,615 (filed on Dec. 1, 2000), which is a CON of Ser. No. 09/268,527 (filed on Mar. 12, 1999, now U.S. Pat. No. 6,210,606), which application is a CON of Ser. No. 08/620,168 (filed Mar. 22, 1996, now U.S. Pat. No. 5,932,143), which application claims benefit of 60/007,688 (filed Nov. 29, 1995).
- U.S. patent application Ser. No. 08/620,619, filed Mar. 22, 1996, entitled. “PLASTICIZED, ANTIPLASTICIZED CRYSTALLINE CONDUCTING POLYMERS AND PRECURSORS THEREOF” now U.S. Pat. No. 5,928,566, and U.S. patent application Ser. No. 08/620,631, filed Mar. 22, 1996 entitled, “METHODS OF FABRICATING PLASTICIZED, ANTIPLASTICIZED AND CRYSTALLINE CONDUCTING POLYMERS AND PRECURSORS THEREOF”, now U.S. Pat. No. 5,969,024 the teachings of which are incorporated herein by reference.
- The present invention is directed to polycrystalline electrically conductive polymer precursors and polycrystalline conducting polymers having adjustable morphology and properties.
- Electrically conductive organic polymers emerged in the 1970's as a new class of electronic materials. These materials have the potential of combining the electronic and magnetic properties of metals with the light weight, processing advantages, and physical and mechanical properties characteristic of conventional organic polymers. Examples of electrically conducting polymers are polyparaphenylene vinylenes, polyparaphenylenes, polyanilines, polythiophenes, polyazines, polyfuranes, polythianaphthenes polypyrroles, polyselenophenes, poly-p-phenylene sulfides, polyacetylenes formed from soluble precursors, combinations thereof and blends thereof with other polymers and copolymers of the monomers thereof.
- These polymers are conjugated systems which are made electrically conducting by doping. The doping reaction can involve an oxidation, a reduction, a protonation, an alkylation, etc. The non-doped or non-conducting form of the polymer is referred to herein as the precursor to the electrically conducting polymer. The doped or conducting form of the polymer is referred to herein as the conducting polymer.
- Conducting polymers have potential for a large number of applications in such areas such as electrostatic charge/discharge (ESC/ESD) protection, electromagnetic interference (EMI) shielding, resists, electroplating, corrosion protection of metals, and ultimately metal replacements, i.e. wiring, plastic microcircuits, conducting pastes for various interconnection technologies (solder alternative), etc. Many of the above applications especially those requiring high current capacity have not yet been realized because the conductivity of the processible conducting polymers is not yet adequate for such applications.
- To date, polyacetylene exhibits the highest conductivity of all the conducting polymers. The reason for this is that polyacetylene can be synthesized in a highly crystalline form (crystallinity as high as 90% has been achieved) (as reported in Macromolecules, 25, 4106, 1992). This highly crystalline polyacetylene has a conductivity on the order of 10.sup.5 S/cm. Although this conductivity is comparable to that of copper, polyacetylene is not technologically applicable because it is a non-soluble, non-processible, and environmentally unstable polymer. The polyaniline class of conducting polymers has been shown to be probably the most suited of such materials for commercial applications. Great strides have been made in making the material quite processable. It is environmentally stable and allows chemical flexibility which in turn allows tailoring of its properties. Polyaniline coatings have been developed and commercialized for numerous applications. Devices and batteries have also been constructed with this material. However, the conductivity of this class of polymers is generally on the low end of the metallic regime. The conductivity is on the order of 10.sup.0 S/cm. Some of the other soluble conducting polymers such as the polythiophenes, poly-para-phenylenevinylenes exhibit conductivity on the order of 10.sup.2 S/cm. It is therefore desirable to increase the conductivity of the soluble/processible conducting polymers, in particular the polyaniline materials.
- The conductivity (a) is dependent on the number of carriers (n) set by the doping level, the charge on the carriers (q) and on the interchain and intrachain mobility (μ) of the carriers.
-
σ=nqμ - Generally, n (the number of carriers) in these systems is maximized and thus, the conductivity is dependent on the mobility of the carriers. To achieve higher conductivity, the mobility in these systems needs to be increased. The mobility, in turn, depends on the morphology of the polymer. The intrachain mobility depends on tile degree of conjugation along the chain, presence of defects, and on the chain conformation. The interchain mobility depends on the interchain interactions, the interchain distance, the degree of crystallinity, etc. Increasing the crystallinity results in increased conductivity as examplified by polyacetylene. To date, it has proven quite difficult to attain polyaniline in a highly crystalline state. Some crystallinity has been achieved by stretch orientation or mechanical deformation (A. G. MacDiarmid et al in Synth. Met. 55-57, 753). In these stretch-oriented systems, conductivity enhancements have been observed. The conductivity enhancement was generally that measured parallel to tile stretch direction. Therefore, the conductivity in these systems is anisotropic. It is desirable to achieve a method of controlling and tuning the morphology of polyaniline. It is desirable to achieve a method of controlling and tuning the degree of crystallinity and the degree of amorphous regions in polyaniline, which in turn provides a method of tuning the physical, mechanical, and electrical properties of polyaniline. It is further desirable to achieve highly crystalline and crystalline polyaniline and to achieve this in a simple and useful manner in order to increase the mobility of the carriers and, therefore, the conductivity of the polymer. It is also further desirable to achieve isotropic conductivity, that is conductivity not dependent on direction as with stretch-oriented polyanilines.
- It is an object of the present invention to provide a polycrystalline material containing crystallites of an electrically conducting polymer precursor and/or electrically conducting polymer having an adjustable morphology.
- It is an object of the present invention to provide a polycrystalline material of an electrically conductive polymer precursor and/or electrically conducting polymer in which the degree of amorphous and crystalline regions is adjustable.
- It is an object of the present invention to provide a polycrystalline material of an electrically conducting polymer precursor and/or electrically conducting polymer having adjustable physical, mechanical, and electrical properties.
- It is an object of the present invention to provide a crystalline electrically conducting polymer precursor and crystalline conducting polymers.
- It is an object of the present invention to provide a highly crystalline electrically conducting polymer precursor and highly crystalline conducting polymers.
- It is an object of the present invention to provide a polycrystalline material of an electrically conducting polymer precursor and/or crystalline conducting polymers to provide a highly crystalline material.
- It is another object of the present invention to provide an electrically conducting polycrystalline material that exhibits enhanced carrier mobility.
- It is another object of the present invention to provide an electrically conducting polycrystalline material which exhibits enhanced conductivity.
- It is another object of the present invention to provide an electrically conducting polycrystalline material which exhibits enhanced isotropic conductivity.
- It is another object of the present invention to provide a plasticization effect in a polycrystalline electrically conducting polymer precursors and/or electrically conducting polymers.
- It is another object of the present invention to provide a polycrystalline material having an antiplasticization effect in electrically conducting polymer precursors and electrically conducting polymers.
- It is another object of the present invention to provide a polycrystalline material of a precursor or electrically conducting polymer containing an additive providing mobility.
- It is another object of the present invention to provide a polycrystalline material of a precursor or electrically conductive polymer containing an additive to induce all enhanced degree of crystallinity.
- It is another object of the present invention to provide a non-stretch oriented polycrystalline film of a precursor or of an electrically conductive polymer which has an enhanced degree of crystallinity.
- It is an object of the present invention to provide a polycrystalline material of an electrically conducting polymer precursor and/or electrically conducting polymer having an increased glass transition temperature.
- It is an object of the present invention to provide an electrically conducting polymer precursor and electrically conducting polymer having an decreased glass transition temperature.
- It is an object of the present invention to provide a polycrystalline material of an electrically conducting polymer precursor and electrically conducting polymer having enhanced mechanical properties.
- It is an object of the present invention to provide a polycrystalline material of an electrically conducting polymer precursor and electrically conducting polymer having decrease mechanical properties.
- A broad aspect of the present invention is a polycrystalline material comprising crystallites of a precursor to an electrically conductive polymer and/or an electrical conductive polymer. The intersticial regions between the crystallites contain amorphous material.
- In a more particular aspect of the present invention, the amorphous regions of the material contain the additive.
- Further objects, features, and advantages of the present invention will become apparent from a consideration of the following detailed description of the invention when read in conjunction with the drawings FIG's. in which:
-
FIG. 1 is a general formula for polyaniline in the non-doped or precursor form. -
FIG. 2 is a general formula for a doped conducting polyaniline. -
FIG. 3 is a general formula for the polysemiquinone radical cation form of doped conducting polyaniline. -
FIG. 4 is a Gel Permeation Chromatograph (GPC) of polyaniline base in NMP (0.1%): GPC shows a trimodal distribution—A very high molecular weight fraction (approx. 12%) and a major peak having lover molecular weight. - Curve 5(a) is a Wide Angle-X-Ray Scattering (WAXS) spectrum for a polyaniline base film processed from NMP. The polymer film is essentially amorphous. Curve 5(b) is a Wide Angle X-Ray Scattering spectrum for a polyaniline base film that has stretch-oriented (I/Io-3.7). This film was derived from a gel. Curve 5(c) is a Wide Angle-X-Ray Scattering spectrum for a polyaniline-base film containing 10% poly-co-dimethyl propylamine siloxane. This film is highly crystalline.
-
FIG. 6 is a Schematic diagram of a polycrystalline material as taught in present invention having crystalline regions (outlined in (dotted rectangles) with intersticial amorphous regions -
FIG. 7 is a Dynamic Mechanical Thermal Analysis (DMTA) plot for polyaniline base film cast from NMP. (First Thermal Scan; under Nitrogen). -
FIG. 8 is a DMTA plot which represents the second thermal scan for a polyaniline base film cast from NMP; This same film was previously scanned as shown inFIG. 7 . Film Contains no residual solvent. -
FIG. 9 is a DMTA plot for polyaniline base film cast from NMP and containing 5% poly-co-dimethyl aminopropyl siloxane (5% N content). First Thermal Scan. -
FIG. 10 is a DMTA plot for polyaniline base film cast from NMP and containing 5% poly-co-dimethyl aminopropyl siloxane (5% N content). Second Thermal Scan (this same film was previously scanned as shown inFIG. 9 ) Film Contains no residual solvent. -
FIG. 11 is a GPC for a polyaniline base solution in NMP containing 5% poly-co-dimethyl aminopropyl siloxane by weight to polyaniline. The polyaniline was 0.1% in NMP. - The present invention is directed toward electrically conducting polymer precursors and conducting polymers having adjustable morphology and in turn adjustable physical, and electrical properties. The present invention is also directed toward controlling and enhancing the 3-dimensional order or crystallinity of conducting polymer precursors and of conducting polymers. In addition, the present invention is directed towards enhancing the electrical conductivity of conducting polymers. This is done by forming an admixture of an electrically conducting polymer precursor or an electrically conducting polymer with an additive whereby the additive provides local mobility to the molecules so as to allow the conducting polymer precursor or conducting polymer chains to associate with one another and achieve a highly crystalline state. An example of such an additive is a plasticizer. A plasticizer is a substance which when added to a polymer, solvates the polymer and increases its flexibility, deformability, generally decreases the glass transition temperature Tg, and generally reduces the tensile modulus. In certain cases, the addition of a plasticizer may induce antiplasticization, that is an increase in the modulus or stiffness of the polymer, an increase in Tg. Herein the additives can provide a plasticization effect, an antiplasticization effect or both effects.
- Examples of polymers which can be used to practice the present invention are of substituted and unsubstituted homopolymers and copolymers of aniline, thiophene, pyrrole, p-phenylene sulfide, azines, selenophenes, furans, thianaphthenes, phenylene vinylene, etc. and the substituted and unsubstituted polymers, polyparaphenylenes, polyparaphenylevevinylenes, polyanilines, polyazines, polythiophenes, poly-p-phenylene sulfides, polyfuranes, polypyrroles, polythianaphthenes, polyselenophenes, polyacetylenes formed from soluble precursors and combinations thereof and copolymers of monomers thereof. The general formula for these polymers can be found in U.S. Pat. No. 5,198,153 to Angelopoulos et al. While the present invention will be described with reference to a preferred embodiment, it is not limited thereto. It will be readily apparent to a person of skill in the art how to extend the teaching herein to other embodiments. One type of polymer which is useful to practice the present invention is a substituted or unsubstituted polyaniline or copolymers of polyaniline having general formula shown in
FIG. 1 wherein each R can be H or any organic or inorganic radical; each R can be the same or different; wherein each R.sup.1 can be H or any organic or inorganic radical, each R.sup.1 can be the same or different; x.gtoreq.1; preferable x.gtoreq.2 and y has a value from 0 to 1. Examples of organic radicals are alkyl or aryl radicals. Examples of inorganic radicals are Si and Ge. This list is exemplary only and not limiting. The most preferred embodiment is emeraldine base form of the polyaniline wherein y has a value of approximately 0.5. The base form is the non-doped form of the polymer. The non-doped form of polyaniline and the non-doped form of the other conducting polymers is herein referred to as the electrically conducting polymer precursor. - In
FIG. 2 , polyaniline is shown doped with a dopant. In this form, the polymer is in the conducting form. If the polyaniline base is exposed to cationic species QA, the nitrogen atoms of the imine (electron rich) part of the polymer becomes substituted with the Q+ cation to form an emeraldinie salt as show inFIG. 2 . Q+ can be selected from H+ and organic or inorganic cations, for example, an alkyl group or a metal. - QA can be a protic acid where Q hydrogen. When a protic acid, HA, is used to dope the polyaniline, the nitrogen atoms of the imine part of the polyaniline are protonated. The emeraldine base form is greatly stalbilized by resonance effects. The charges distribute through the nitrogen atoms and aromatic rings making the imine and amine nitrogens indistinguishable. The actual structure of the doped form is a delocalized polysemiquinone radical cation as shown in
FIG. 3 . - The emeraldine base form of polyaniline is soluble in various organic solvents and in various aqueous acid solutions. Examples or organic solvents are dimethylsulfoxide (DMSO), dimethylformamide (DMF) and N-methylpyrrolidinone (NMP), dimethylene propylene urea, tetramethyl urea, etc. This list is exemplary only and not limiting. Examples of aqueous acid solutions is 80% acetic acid and 60-88% formic acid. This list is exemplary only and not limiting.
- Polyaniline base is generally processed by dissolving the polymer in NMP. These solutions exhibit a bimodal or trimodal distribution in Gel Permeation Chromatography (GPC) as a result of aggregation induced by internal hydrogen bonding between chains as previously described in U.S. patent application Ser. No. 08/370,128, filed on Jan. 9, 1995, the teaching of which is incorporated herein by reference. The GPC curve for typical polyaniline base in NMP is shown in
FIG. 4 . - Polymers in general can be amorphous, crystalline, or partly crystalline. In the latter case, the polymer consists of crystalline phases and amorphous phases. The morphology of a polymer is very important in determining the polymer's physical, mechanical, and electronic properties.
- Polyaniline base films processed from NMP either by spin coating or by solution casting techniques are amorphous as can be seen in
FIG. 5 a which depicts the Wide Angle X-Ray Scattering (WAXS) spectrum for this material. Amorphous diffuse scattering is observed. Some crystallinity is induced in these films by post processing mechanical deformation especially if these films are derived from gels as described by A. G. MacDiarmid et al in Synth. Met. 55-57, 753 (1993), WAXS of a stretch oriented film having been stretched (I/Io=3.7×) derived from a gel is shown inFIG. 5 b. Some has been induced as compared to the non-stretch oriented films as evidenced by the defined scattering peaks. - Doping the amorphous polyaniline base films (those having structure shown in
FIG. 5 a) with aqueous hydrochloric acid results in isotropic conductivity of 1 S/cm. Such films are not crystalline. Similar doping of stretch oriented films results in anisotropic conductivity where conductivity on the order of 10.sup.2 S/cm is measured parallel to the stretch direction whereas conductivity on the order of 10.sup.0 S/cm is measured perpendicular to the stretch direction. It should also be noted that some level of crystallinity is lost during the doping process in these films. - According to the present invention, the interchain (polymer chain) registration is increased as compared to a stretch oriented film.
-
FIGS. 7 and 8 show the dynamic mechanical thermal analysis (DMTA) spectrum for a polyaniline base film processed from NMP alone.FIG. 7 is the first scan where a Tg of approx. 118 is observed as a result of the residual NMP which is present in the film.FIG. 8 is the second thermal scan of the same film. This film has no residual solvent and a Tg of .congruent.251.degree. C. is measured for the polyaniline base polymer. - When an additive such as a plasticizer, such as a poly-co-dimethyl propylamine siloxane, is added to the polyaniline base completely different properties and morphology is observed. The siloxane has a polar amine group which facilitates the miscibility of the polyaniline base and the plasticizer. The DMTA of a polyaniline base film cast from NMP and containing 55 by weight to polyaniline of the poly-co-dimethyl propyl amine siloxane exhibits a lower Tg on the first thermal scan as compared to polyaniline base processed from NMP alone (
FIG. 9 ) as a result of plasticization induced by the siloxane. However, on the second thermal scan of this film (FIG. 10 ), the polymer exhibits an increase in Tg as compared to polyaniline processed from NMP. When the polysiloxane is added to a solution of polyaniline base, the siloxane due to the polar amine group can interact with the polymer chains and disrupt some of the polyaniline interactions with itself or some of the aggregation. Thus, the polysiloxane first induces some deaggregation. However, the polysiloxane has multiple amine sites and thus, it can itself hydrogen bond with multiple polyaniline base chains and thus, the polysiloxane facilitates the formation of a cross-linked network. This cross-linked network accounts for the increased Tg observed in the DMTA. Tg is characteristic of the amorphous regions of a polymer and in this case the amorphous regions consist of a cross-linked polyaniline/polysiloxane network. Thus, the polysiloxane is inducing an antiplasticization effect in polyaniline base as the Tg is increased. Generally, plasticizers reduce Tg. GPC data (FIG. 11 ) is consistent with this model. The addition of the poly-amino containing siloxane to a polyaniline base solution in NMP results in a significant increase in the high molecular weight fractions depicting the cross-linked network which forms between polyaniline and the plasticizer. - In addition to the cross-linked network the siloxane induces in the amorphous regions, concomitantly it also is found to induce significant levels of crystallinity in polyaniline base as a result of the local mobility that it provides.
FIG. 5 c shows the WAXS for a polyaniline base film processed from NMP containing 10% of the poly amino containing siloxane. As can be seen highly crystalline polyaniline has bee attained. Much higher levels of crystallinity as compared toFIG. 5 b for the stretch oriented films. - Thus polyaniline by the addition of the siloxane forms a structure depicted in
FIG. 6 where crystalline regions of highly associated polyaniline chains (outlined by a rectangle) are formed with intersticial amorphous regions. In most cases, the additive resides in the amorphous intersticial sites. The degree of crystallinity (number of crystalline sites) and the size of the crystalline domains as well as the degree of amorphous regions and the nature of the amorphous region (aggregated, i.e. cross-linked or not) can be tuned by the type and amount of additive. In turn, by controlling the above, the properties of the material can also be controlled. - With the poly-co-dimethyl aminopropyl siloxane (5% N content), loadings ranging from 0.001 to 20% by weight gives highly crystalline polyaniline. The highly crystalline polyaniline in turn exhibits increased modulus, stiffness, yield and tensile strengths, hardness, density and softening points. Thus, the siloxane at these loadings is having an antiplasticization effect. Above 20% loading, the crystallinity begins to decrease. As the crystallinity decreases, the modulus, stiffness, Yield and tensile strengths, hardness, density and softening points begin to decrease. Thus, the siloxane at these loadings begins to have a plasticization effect. The siloxane content becomes high enough that it disrupts the polyaniline base interactions in the crystalline regions. With the poly co dimethyl aminopropyl siloxanes having 0.5 and 13% N ratios, similar trends are observed but the particular amount of siloxane needed to have a plasticization effect or an antiplasticization effect varies. Thus, the degree of crystallinity and the degree of amorphous regions and in turn the properties of polyaniline can be tuned by the nature of the additive as well as the amount of additive. Indeed, using the same additive but simply changing the loading dramatically changes the morphology and in turn the properties of polyaniline. electronic properties of the polymer are also impacted. The conductivity of a polyaniline base film cast from NMP and containing 1% by weight poly-co-dimethyl aminopropyl siloxane which is doped by aqueous hydrochloric acid is 50 S/cm as compared to 1 S/cm for a polyaniline film with no plasticizer. This is isotropic conductivity. The doped film containing the polysiloxane retains the highly crystalline structure.
- The degree of crystallinity and the degree of amorphous regions and in turn the physical, mechanical, and electronic properties can be tuned by the particular additive used and by the amount of additive. For example, the Tg of polyaniline can be increased or decreased by the amount and type of additive. The mechanical properties such as tensile properties, modulus, impact resistance, etc. can be tuned as described above. The additive can range from 0.001 to 90% by weight, more preferably from 0.001 to 50% and most preferably from 0.001 to 25%. A list of plasticizers that can be used to practice the present invention is given in Table 1. The additive can also be removed from the final film structure if so desired by appropriate extraction.
- Polyaniline Synthesis Polyaniline is synthesized by the oxidative polymerization of aniline using ammonium peroxydisulfate in aqueous hydrochloric acid. The polyaniline hydrochloride precipitates from solution. The polymer is then neutralized using aqueous ammonium hydroxide. The neutralized or non-dope polyaniline base is then filtered, washed and dried. Polyaniline can also be made by electrochemical oxidative polymerization as taught by W. Huang, B. Humphrey, and A. G. MacDiarmid, J. Chem. Soc., Faraday Trans. 1, 82, 2385, 1986.
- The polyaniline base powder is readily dissolved in NMP up to 5% solids. Thin films (on the order of a micron) can be formed by spin-coating. Thick films are made by solution casting and drying (70.degree. C. in vacuum oven under a nitrogen purge for 15 hours). These solutions and films have the properties described above.
- a. Polyaniline Base was first dissolved in NMP to 5% solids and allowed to mix well. A poly-co-dimethyl, aminopropyl siloxane (N content 5% relative to repeat unit) was dissolved to 5% in NMP. The siloxane solution was added to the polyaniline base solution. The resulting admixture was allowed to mix for 12 hours at room temperature. A number of solutions were made having from 0.001% to 50% siloxane content (by weight relative to polyaniline). Thin films were spin-coated onto quartz substrates; Thick films were prepared by solution casting and baking the solutions at 70.degree. C. in a vacuum oven under a Nitrogen purge for 15 hours). The solutions and the films have the properties described above.
- b. The same experiment described in (a) was carried out except that the plasticizer was a poly-co-dimethyl, aminopropyl siloxane in which the N content was 13%.
- c. The same experiment described in (a) was carried out except that the plasticizer was a poly-co-dimethyl, aminopropyl siloxane in which the N content was 0.5%.
- d. The same experiment described in (a) was carried out except that the plasticizer was polyglycol diacid.
- e. The same experiment described in (a) was carried out except that the plasticizer was 3,6,9-trioxaundecanedioic acid.
- f. The same experiment described in (a) was carried out except that the plasticizer was poly(ethylene glycol) tetrahydro furfuryl ether.
- g. The same experiment described in (a) was carried out except that the plasticizer was glycerol triacetate.
- h. The same experiment described on (a) was carried out except the plasticizer was epoxidized soy bean oil.
- The same experiment as described in (a) was carried out except that polyaniline base and the plasticizer was dissolved in NMP/m-Cresol mixtures in which m-Cresol ranged from 1 to 99%
- Polyaniline Base in m-Cresol/Plasticizer
- The same experiment as described in (a) was carried out except that the polyaniline base was dissolved in m-Cresol and the plasticizer was dissolved in m-Cresol.
- Polyaniline Base in m-Cresol and in NMP/m-Cresol
- Polyaniline Base was dissolved in m-Cresol and in NMP/m-Cresol combinations to 5% solids. The m-Cresol in the latter system being the additive ranged from 1 to 99%. Free-Standing films were made by solution casting techniques. With increasing m-cresol content, the polyaniline exhibited a WAXS similar to that shown in
FIG. 5 a except that the amorphous scattering peak became somewhat sharper indicative of some crystallinity. However, this was significantly less than observed with the siloxane plasticizer. - 1. Hydrochloric Acid and/or Methanesulfonic Acid Doped Films
- Polyaniline base films made as described above were doped by aqueous acid solutions of hydrochloric or methanesulfonic acid. The films were immersed in the acid solution for 12 hours for thin films and 36 hours for the thick films. The conductivity of a polyaniline base film processed from NMP and doped with these acid solutions is 1 S/cm The conductivity of a base film processed from NMP and 1% poly-co-dimethyl, aminopropyl siloxane (5% N content) was 50 S/cm.
- Polyaniline Base was dissolved in a solvent such as NMP or NMP/m-Cresol combinations, etc. from 1 to 5% solids. To this solution was added a dopant such camphorsulfonic acid or acrylamidopropanesulfonic acid (previously reported in U.S. patent application Ser. No. 595,853 filed on Feb. 2, 1996). These solutions were used to spin-coat or solution cast films. In some experiments, the plasticizer such as the poly-co-dimethyl, aminopropyl siloxane in a solvent was added to the doped polyaniline solution. In certain other experiments, the plasticizer was first added to the pani base solution. The dopant was then added to the polyaniline solution containing the plasticizer.
- The teaching of the following U.S. patent applications are incorporated herein by reference:
- “CROSS-LINKED ELECTRICALLY CONDUCTIVE POLYMERS, PRECURSORS THEREOF AND APPLICATIONS THEREOF”, application Ser. No. 595,853, filed Feb. 2, 1996, now U.S. Pat. No. 6,193,909;
“METHODS OF FABRICATION OF CROSS-LINKED ELECTRICALLY CONDUCTIVE POLYMERS AND PRECURSORS THEREOF”, application Ser. No. 594,680, filed Feb. 2, 1996, now U.S. Pat. No. 6,030,550;
“DEAGGREGATED ELECTRICALLY CONDUCTIVE POLYMERS AND PRECURSORS THEREOF”, application Ser. No. 370,127, filed Jan. 9, 1995, now U.S. Pat. No. 5,804,100; and
“METHODS OF FABRICATION OF DEAGGREGATED ELECTRICALLY CONDUCTIVE POLYMERS AND PRECURSORS THEREOF”, application Ser. No. 370,128, filed Jan. 9, 1995, now U.S. Pat. No. 6,087,472. - While the present invention has been shown and described with respect to a preferred embodiment, it will be understood that numerous changes, modifications, and improvements will occur to those skilled in the art without departing from the spirit and scope of the invention.
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TABLE I PLASTICIZERS ADIPIC ACID DERIVATIVES Dicapryl adipate Di-(2-ethylhexyl) adipate Di(n-heptyl, n-nonyl) adipate Diisobutyl adipate Diisodecyl adipate Dinomyl adipate Di-(tridecyl) adipate AZELAIC ACID DERIVATIVES Di-(2-ethylhexyl azelate) Diisodecyl azelate Diisoctyl azelate Dimethyl azelate Di-n-hexyl azelate BENZOIC ACID DERIVATIVES Diethylene glycol dibenzoate Dipropylene glycol dibenzoate Polyethylene glycol 200 dibenzoate CITRIC ACID DERIVATIVES Acetyl tri-n-butyl citrate Acetyl triethyl citrate Tri-n-butyl citrate Triethyl citrate DIMER ACID DERIVATIVES Bis-(2-hydroxyethyl dimerate) EPOXY DERIVATIVES Epoxidized linseed oil Epoxidized soy bean oil 2-Ethylhexyl epoxytallate n-Octyl expoxystearate FUMARIC ACID DERIVATIVES Dibutyl fumarate GLYCEROL DERIVATIVES Glycerol triacetate ISOBUTYRATE DERIVATIVE 2,2,4-Trimethyl-1,3-pentanediol Diisobutyrate ISOPHTHALIC ACID DERIVATIVES Di-(2-ethylhexyl) isophthalate Dimethyl isophthalate Diphenyl isophthalate LAURIC ACID DERIVATIVES Methyl laurate LINOLEIC ACID DERIVATIVE Methyl linoleate, 75% MALEIC ACID DERIVATIVES Di-(2-ethylhexyl) maleate Di-n-butyl maleate MELLITATES Tricapryl trimellitate Tri-(2-ethylhexyl) trimellitate Triisodecyl trimellitate Tri-(n-octyl, n-hecyl) trimellitate MYRISTIC ACID DERIVATIVES Isopropyl myristate OLEIC ACID DERIVATIVES Butyl oleate Glycerol monooleate Glycerol trioleate Methyl oleate n-Propyl oleate Tetrahydrofurfuryl oleate PALMITIC ACID DERIVATIVES Isopropyl plamitate Methyl palmitate PARAFFIN DERIVATIVES Chloroparaffin, 41% Cl Chloroparaffin, 50% Cl Chloroparaffin, 60% Cl Chloroparaffin, 70% Cl PHOSPHORIC ACID DERIVATIVES 2-Ethylhexyl diphenyl phosphate isodecyl diphenyl phosphate 4-Butylphenyl diphenyl phosphate Tri-butoxyethyl phosphate Tributyl phosphate Tricresyl phosphate Triphenyl phosphate PHTHALIC ACID DERIVATIVES Butyl benzyl phthalate Butyl octyl phthalate Dicapryl phthalate Dicyclohexyl phthalate Di-(2-ethylhexyl) phthalate Diethyl phthalate Dihexyl phthalate Diisobutyl phthalate Diisodecyl phthalate Diisononyl phthalate Diisooctyl phthalate Dimethyl phthalate Ditridecyl phthalate Diundecyl phthalate RICINOLEIC ACID DERIVATIVES Butyl ricinoleate Glyceryl tri(acetyl) ricinoleate) Methyl acetyl ricinoleate Methyl ricinoleate n-Butyl acetyl ricinoleate Propylene glycol ricinoleate SEBACIC ACID DERIVATIVES Dibutyl sebacate Di-(2-ethylhexyl) sebacate Dimethyl sebacate STEARIC ACID DERIVATIVES Ethylene glycol monostearate Glycerol monostearate Isopropyl isostearate Methyl stearate n-Butyl stearate Propylene glycol monostearate SUCCINIC ACID DERIVATIVES Dimethyl succinate SULFONIC ACID DERIVATIVES N-Ethyl o,p-toluenesulfonamide o,p-toluenesulfonanamide Polyesters adipic acid polyester Paraplex G-40 adipic acid polyester Santicizer 334F azelaic acid polyester Plastolein 9720) azelaic acid polyester Plastolein 9750 sebacic acid polyester Paraplex G-25 Sucrose derivatives sucrose acetate-isobutyrate (SAIB) Tartaric acid derivative dibutyl tartrate Terephthalic acid derivative bis(2-ethylhexyl) terephthalate (DOTP) Trimellitic acid derivatives tris(2-ethylhexyl) trimellitate (TOTM) heptyl nonyl trimellitate heptyl nonyl undecyl trimellitate triisodecyl trimellitate Glycol derivatives diethylene glycol dipelargonate triethylene glycol di-2 ethylbutyrate poly(ethylene glycol) (200) di-2- ethylhexanoate Glycolates methyl phthalyl ethyl glycolate butyl phthalyl butyl glycolate Hydrocarbons hydrogenated terphenyls HB-40 poly(alkyl naphthalene)s Panaflex aliphatic aromatics Leromoll chlorinated paraffin (52 wt % Cl), Cerecol S-52 Terpenes and Derivatives Camphor Hydrogenated methyl ester or rosin Phosphonic Acid Derivatives Chlorinated Polyphosphanate Siloxanes Polydimethyl siloxane Polyco-dimetyhyl/propylamine siloxanes with various amount of propylamine content Polydiphenylsiloxanes Polyco-dimethylphenyl siloxanes Silanol terminated polysiloxanes Amino terminated polysiloxanes Epoxy terminated polysiloxanes Carbirol terminated polysiloxanes Polysiloxanes Glycols Polyethylene glycol Poly(ethylene glycol) tetrahydrofurfuryl ether Poly(ethylene glycol) bis(carboxymethyl) ether 3,6,9-trioxadecanoic acid 3,6,9-trioxaundecanedioic acid Polyglycol diacid
Claims (35)
Priority Applications (1)
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US12/137,646 US20090032775A1 (en) | 1995-11-29 | 2008-06-12 | Polycrystalline conducting polymers and precursors thereof having adjustable morphology and properties |
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US768895P | 1995-11-29 | 1995-11-29 | |
US08/620,618 US5932143A (en) | 1995-11-29 | 1996-03-22 | Polycrystalline conducting polymers and precursors thereof having adjustable morphology and physical properties |
US09/268,527 US6210606B1 (en) | 1995-11-29 | 1999-03-12 | Polycrystalline conducting polymers and precursors thereof having adjustable morphology and properties |
US09/727,615 US7404914B2 (en) | 1995-11-29 | 2000-12-01 | Polycrystalline conducting polymers having adjustable morphology and properties |
US12/137,646 US20090032775A1 (en) | 1995-11-29 | 2008-06-12 | Polycrystalline conducting polymers and precursors thereof having adjustable morphology and properties |
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US09/727,615 Division US7404914B2 (en) | 1995-11-29 | 2000-12-01 | Polycrystalline conducting polymers having adjustable morphology and properties |
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US08/620,618 Expired - Lifetime US5932143A (en) | 1995-11-29 | 1996-03-22 | Polycrystalline conducting polymers and precursors thereof having adjustable morphology and physical properties |
US09/268,527 Expired - Lifetime US6210606B1 (en) | 1995-11-29 | 1999-03-12 | Polycrystalline conducting polymers and precursors thereof having adjustable morphology and properties |
US09/727,615 Expired - Fee Related US7404914B2 (en) | 1995-11-29 | 2000-12-01 | Polycrystalline conducting polymers having adjustable morphology and properties |
US12/137,646 Abandoned US20090032775A1 (en) | 1995-11-29 | 2008-06-12 | Polycrystalline conducting polymers and precursors thereof having adjustable morphology and properties |
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US09/268,527 Expired - Lifetime US6210606B1 (en) | 1995-11-29 | 1999-03-12 | Polycrystalline conducting polymers and precursors thereof having adjustable morphology and properties |
US09/727,615 Expired - Fee Related US7404914B2 (en) | 1995-11-29 | 2000-12-01 | Polycrystalline conducting polymers having adjustable morphology and properties |
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US5928566A (en) * | 1995-11-29 | 1999-07-27 | International Business Machines Corporation | Plasticized, antiplasticized and crystalline conducting polymers |
US5932143A (en) * | 1995-11-29 | 1999-08-03 | International Business Machines Corporation | Polycrystalline conducting polymers and precursors thereof having adjustable morphology and physical properties |
US6982514B1 (en) * | 2000-05-22 | 2006-01-03 | Santa Fe Science And Technology, Inc. | Electrochemical devices incorporating high-conductivity conjugated polymers |
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US20020158231A1 (en) | 2002-10-31 |
US6210606B1 (en) | 2001-04-03 |
US7404914B2 (en) | 2008-07-29 |
US5932143A (en) | 1999-08-03 |
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