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Influence of Temperature on the Ultrasonic Degradation of Poly(vinyl acetate) and Poly(vinyl chloride)

Chattopadhyay, Sujay and Madras, Giridhar (2003) Influence of Temperature on the Ultrasonic Degradation of Poly(vinyl acetate) and Poly(vinyl chloride). In: Journal of Applied Polymer Science, 88 (12). pp. 2818-2822.

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Official URL: http://dx.doi.org/10.1002/app.12130

Abstract

This study investigates the effect of temperature on the ultrasonic degradation of polyvinyl acetate and polyvinyl chloride in chlorobenzene. The time evolution of molecular weight distribution was determined using gel permeation chromatography. Continuous distribution kinetics was used to obtain the degradation rate coefficients. The rate coefficients decrease with increasing temperature, and this is attributed to the increase of vapor pressure and the decrease of kinematic viscosity. The degradation rate coefficient also changes sharply near the glass transition temperature, indicating that this factor may play a role in the degradation process.

Item Type: Journal Article
Additional Information: The copyright belongs to Wiley Periodicals, Inc.
Keywords: degradation;gel permeation chromatography;glass transition;viscosity;effect of temperature
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Date Deposited: 16 Dec 2005
Last Modified: 20 Jul 2011 05:51
URI: http://eprints.iisc.ernet.in/id/eprint/4397

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