Influence of HZSM-5 catalyst on the thermal degradation of poly(vinyl chloride) in solution

Chattopadhyay, Sujay and Madras, Giridhar (2002) Influence of HZSM-5 catalyst on the thermal degradation of poly(vinyl chloride) in solution. In: Journal of Applied Polymer Science, 84 (4). pp. 791-796.

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Abstract

The kinetics of thermal degradation of poly(vinyl chloride) (PVC) in solution was investigated at various temperatures (210-250degreesC). The degradation rate coefficients were determined from the time evolution of the molecular weight distribution (MWD). The energy of activation, determined from the temperature dependence of the rate coefficient, was 26.6 kcal/mol. The degradation of PVC was also studied in the presence of a catalyst (HZSM-5 zeolite). The results indicated that increase of the degradation rate of PVC is first order with the HZSM-5 concentration up to 50 g/L and zero order at higher concentrations. The thermal degradation kinetics of PVC in the presence of 50 g/L of the catalyst was studied at various temperatures. The temperature dependency of the rate coefficient was used to calculate the activation energy (21.5 kcal/mol). This is consistent with the observation that the presence of a catalyst generally decreases the activation energy and promotes degradation. (C) 2002 John Wiley Sons, Inc.

Item Type:	Journal Article
Publication:	Journal of Applied Polymer Science
Publisher:	John Wiley and Sons
Additional Information:	Copyright of this article belongs to John Wiley and Sons.
Keywords:	degradation;GPC;catalysts
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	19 Jul 2011 06:42
Last Modified:	19 Jul 2011 06:42
URI:	http://eprints.iisc.ac.in/id/eprint/39244

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