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Publication numberUST960004 I4
Publication typeGrant
Application numberUS 05/690,313
Publication dateJul 5, 1977
Filing dateMay 26, 1976
Priority dateMay 14, 1974
Publication number05690313, 690313, US T960004 I4, US T960004I4, US-I4-T960004, UST960004 I4, UST960004I4
InventorsGarth E. Neville
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for concurrent measurement of polymer melt
US T960004 I4
a polymer melt's rheological properties are comprehensively described by defining the constants K and n in the rheological equation: T= KGn where T= shear stress and G= shear rate. The constants are determined by a rheometer which divides a molten polymer sample into two streams pumped by positive displacement pumps having identical speed-displacement characteristics past pressure transducers and finally through dissimilar capillaries to atmosphere. The pressure in each line is regulated at a predetermined level. Pressure and tachometer readings are used to compute the constants K and n.
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5637790 *Feb 28, 1996Jun 10, 1997De Corral; Jose L.Three capillary flow-through viscometer
US5661232 *Mar 6, 1996Aug 26, 1997Micro Motion, Inc.Coriolis viscometer using parallel connected Coriolis mass flowmeters
US6276195 *Oct 31, 2000Aug 21, 2001Waters Investments LimitedThree capillary flow-through viscometer
EP0437252A2 *Jan 9, 1991Jul 17, 1991E.I. Du Pont De Nemours And CompanyMethod and apparatus for using flow behavior index to control polymer rheology and physical properties
EP1022556A1 *Nov 11, 1999Jul 26, 2000Göttfert Werkstoff-Prüfmaschinen GmbhDevice for determining the rheological properties of a melt
U.S. Classification73/54.05
International ClassificationG01N11/04
Cooperative ClassificationG01N11/04
European ClassificationG01N11/04