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Thermal degradation of polystyrene

Kishore, K and Verneker, VR Pai and Nair, MNR (1976) Thermal degradation of polystyrene. In: Journal of Applied Polymer Science, 20 (9). pp. 2355-2365.

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The importance of the study of thermal degradation of polymeric fuels arises from their role in the combustion of solid propellants. Estimation of the condensed-phase heat release during combustion can be facilitated by the knowledge of the enthalpy change associated with the polymer degradation process. Differential scanning calorimetry has been used to obtain enthalpy data. Kinetic studies on the polymeric degradation process have been carried out with the following objectives. The literature values of activation energies are quite diverse and differ from author to author. The present study has tried to locate possible reasons for the divergence in the reported activation energy values. A value of 30 kcal has been obtained and found to be independent of the technique employed. The present data on the kinetics support to chain-end initiation and unzipping process. The activation energies are further found to be independent of the atmosphere in which the degradation of polymer fuel is carried out. The degradation in air, N2, and O2 all yield a value of 30 kcal/mole for the activation energies.

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, Inc.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 10 Dec 2009 09:44
Last Modified: 18 Apr 2011 04:44
URI: http://eprints.iisc.ac.in/id/eprint/24193

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