Oxidative and photooxidative degradation of poly(acrylic acid)

Shukla, Neelesh Bharti and Daraboina, Nagu and Madras, Giridhar (2009) Oxidative and photooxidative degradation of poly(acrylic acid). In: Polymer Degradation and Stability, 94 (8). pp. 1238-1244.

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Abstract

The oxidative degradation of poly(acrylic acid) (PAA), a water soluble polymer, was studied at various temperatures with different concentrations of persulfates, potassium persulfate (KPS), ammonium persulfate (APS) and sodium persulfate (SPS). The photodegradation of PAA was also examined with APS as oxidizer. The degraded samples were analyzed for the time evolution of molecular weight distribution by gel permeation chromatography. A theoretical model based on the continuous distribution kinetics was developed that accounted for the polymer degradation and the dissociation of persulfate. The rate coefficients for the oxidative and photooxidative degradation of PAA were determined from the parametric fit of the model with experimental data. The rate of degradation increased with increasing amount of persulfate in both oxidative and photooxidative degradation. The rate of degradation also increased with increasing temperature in the case of oxidative degradation.

Item Type:	Journal Article
Publication:	Polymer Degradation and Stability
Publisher:	Elsevier Science
Additional Information:	Copyright of this articls belongs to Elsevier Science.
Keywords:	Poly(acrylic acid);Oxidative;Photooxidative;Degradation; Persulfate
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	29 Dec 2009 06:54
Last Modified:	19 Sep 2010 05:39
URI:	http://eprints.iisc.ac.in/id/eprint/21830

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