Ultrasonic degradation of poly(methyl methacrylate-co-alkyl acrylate) copolymers

Konaganti, Vinod Kumar and Madras, Giridhar (2010) Ultrasonic degradation of poly(methyl methacrylate-co-alkyl acrylate) copolymers. In: Ultrasonics Sonochemistry, 17 (2). pp. 403-408.

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Abstract

The copolymers, poly(methyl methacrylate-co-methyl acrylate) (PMMAMA), poly(methyl methacrylate-co-ethyl acrylate) (PMMAEA) and poly(methyl methacrylate-co-butyl acrylate) (PMMABA), of different compositions were synthesized and characterized. The effect of alkyl acrylate content, alkyl group substituents and solvents on the ultrasonic degradation of these copolymers was studied. A model based on continuous distribution kinetics was used to study the kinetics of degradation. The rate coefficients were obtained by fitting the experimental data with the model. The linear dependence of the rate coefficients on the logarithm of the vapor pressure of the solvent indicated that vapor pressure is the crucial parameter that controls the degradation process. The rate of degradation increases with an increase in the alkyl acrylate content. At any particular copolymer composition, the rate of degradation follows the order: PMMAMA > PMMAEA > PMMABA. It was observed that the degradation rate coefficient varies linearly with the mole percentage of the alkyl acrylate in the copolymer.

Item Type:	Journal Article
Publication:	Ultrasonics Sonochemistry
Publisher:	Elsevier Science
Additional Information:	Copyright for this article belongs to Elsevier Science.
Keywords:	Ultrasonic degradation; Methyl methacrylate copolymers; Alkyl acrylates; Continuous distribution kinetics
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	12 Jan 2010 08:44
Last Modified:	19 Sep 2010 05:54
URI:	http://eprints.iisc.ac.in/id/eprint/25351

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