De, Priyadarsi and Chattopadhyay, Sujay and Madras, Giridhar and Sathyanarayana, DN (2002) Thermal degradation kinetics of para-substituted poly (styrene peroxide)s in solution. In: Journal of Applied Polymer Science, 86 (4). pp. 957-961.
The thermal degradation of three polymeric peroxides of styrene monomers with substituents in the para position was studied at various temperatures (65, 75, 85, and 95°C). A continuous distribution model was used to evaluate the rate coefficients for the random-chain and chain-end scission degradation from the evolution of molecular weight distributions with time. The activation energy determined from the temperature dependence of the rate coefficients was in the range 18-22 kcal mol-1. This result suggests that the thermal degradation of polyperoxide is controlled by the dissociation of the O - O bonds in the polymer backbone. The thermal stability for poly(p-methylstyrene peroxide) lies in between that of poly(p-tert-butylstyrene peroxide) (highest) and poly(p-bromostyrene peroxide) (lowest).
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Wiley Periodicals, Inc., A Wiley Company|
|Keywords:||polyperoxide;thermal degradation;molecular weight distributions;activation energy|
|Department/Centre:||Division of Chemical Sciences > Inorganic & Physical Chemistry
Division of Mechanical Sciences > Chemical Engineering
|Date Deposited:||14 Jul 2004|
|Last Modified:||19 Sep 2010 04:13|
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