Viscosity of concentrated solutions of polystyrene and poly(vinyl acetate) (empirical equations)

Viscosity of concentrated solutions of polystyrene and poly(vinyl acetate) (empirical equations) The viscosity of solutions of polystyrene with M w from 2.8 × 104 to 7.8 × 105 in toluene and of poly(vinyl acetate) with M w from 2 × 104 to 1.4 × 105 in butyl acetate at 30–80°C is measured. The dependence of the activation energy of the viscous flow of the solutions on the molecular weight of the polymers and solution concentration is examined. This dependence is approximated by a cubic polynomial for polystyrene solutions and by a quadratic polynomial for poly(vinyl acetate) solutions. The dependences of the solution viscosity on the concentration, molecular weight, and temperature are approximated by exponential equations in which the exponents are sums of polynomials. The coefficients of the polynomials are determined. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Viscosity of concentrated solutions of polystyrene and poly(vinyl acetate) (empirical equations)

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Publisher
Nauka/Interperiodica
Copyright
Copyright © 2007 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S107042720711033X
Publisher site
See Article on Publisher Site

Abstract

The viscosity of solutions of polystyrene with M w from 2.8 × 104 to 7.8 × 105 in toluene and of poly(vinyl acetate) with M w from 2 × 104 to 1.4 × 105 in butyl acetate at 30–80°C is measured. The dependence of the activation energy of the viscous flow of the solutions on the molecular weight of the polymers and solution concentration is examined. This dependence is approximated by a cubic polynomial for polystyrene solutions and by a quadratic polynomial for poly(vinyl acetate) solutions. The dependences of the solution viscosity on the concentration, molecular weight, and temperature are approximated by exponential equations in which the exponents are sums of polynomials. The coefficients of the polynomials are determined.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Dec 27, 2007

References

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