Apparatus for concurrent measurement of polymer melt
United States Patent T960004
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.
Inventors:
Neville, Garth E. (307 Brandywine Dr., Old Hickory, TN, 37138)
Application Number:
05/690313
Publication Date:
07/05/1977
Filing Date:
05/26/1976
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International Classes:
G01N11/04; G01N11/00