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Rheological studies of the poly(styrene-co-acrylonitrile) and poly(vinyl chloride-co-vinyl acetate) blends

✍ Scribed by Gaurab Das; A. N. Banerjee

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 243 KB
Volume: 69
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19980926)69:13<2577::aid-app7>3.0.co;2-7

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✦ Synopsis

The rheological studies of the poly(vinyl chloride-co-vinyl acetate) and poly-(styrene-co-acrylonitrile) blends were performed by a Brabender Rheotron at three different temperatures and also at different shear rates. Flow curves of the blends at different temperatures were drawn. The flow behavior index and, also, zero-shear viscosity of the blends at different temperatures were determined. From the flow curves, it has been found that as shear stress increases, melt viscosity decreases at all temperatures, indicating that pseudoplastic behavior and experimental values lies above the line of the log-additivity value and below the line of the additivity rule of mixture.

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