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Title: Effect of solvent on the ultrasonic degradation of poly(vinyl acetate)
Authors: Madras G.
Chattopadhyay, Sujay
Published in: Polymer Degradation and Stability
Abstract: The ultrasonic degradation of poly(vinyl acetate) was carried out in six different solvents and two mixtures of solvents. The evolution of molecular weight distribution (MWD) with time was determined with gel permeation chromatography. The observed MWDs were analyzed by continuous distribution kinetics. A stoichiometric kernel that accounts for preferential mid-point breakage of the polymer chains was used. The degradation rate coefficient of the polymer in each solvent was determined from the model. The variations of rate coefficients were correlated with vapor pressure of the solvent, the Flory-Huggins polymer-solvent interaction parameter and the kinematic viscosity of the solution. A lower saturation vapor pressure resulted in higher degradation rates of the polymer. The degradation rate increased with increasing kinematic viscosity.
Citation: Polymer Degradation and Stability, 71(2): 273-278
Issue Date: 2001
Keywords: Degradation
Molecular weight distribution
Organic solvents
Reaction kinetics
Vapor pressure
Continuous distribution kinetics
Ultrasonic degradation
Polyvinyl acetates
ISSN: 1413910
Author Scopus IDs: 7005905149
Author Affiliations: Madras, G., Department of Chemical Engineering, Indian Institute of Science, Bangalore 560 012, India
Chattopadhyay, S., Department of Chemical Engineering, Indian Institute of Science, Bangalore 560 012, India
Appears in Collections:Journal Publications [PE]

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