Degradation Kinetics for Polymer Mixtures in Solution

Karmore, Vishal and Madras, Giridhar (2001) Degradation Kinetics for Polymer Mixtures in Solution. In: Industrial and Engineering Chemistry Research, 40 (5). 1306 -1311.

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Abstract

The degradation rate of a polymer mixture depends on the particular polymer mixture, and the presence of a second polymer can increase, decrease, or not affect the degradation rate of the first polymer. The degradation rates of poly(vinyl acetate) in both the presence and absence of polystyrene at various temperatures $(220-250^o C)$ were experimentally determined. The molecular weight distributions of the polymers were obtained by analyzing the samples by gel permeation chromatography. Continuous distribution kinetics were employed for determining the degradation rates of binary polymer mixtures. The results indicated that, because of the interaction of mixed radicals with polymer by hydrogen abstraction, the degradation rates of poly(vinyl acetate) are considerably enhanced in the presence of polystyrene, while the degradation rate of polystyrene decreases.

Item Type:	Journal Article
Publication:	Industrial and Engineering Chemistry Research
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	16 Mar 2007
Last Modified:	19 Sep 2010 04:36
URI:	http://eprints.iisc.ac.in/id/eprint/10418

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