Girish Deshpande, M. Rezac
2002
Citations
5
Influential Citations
109
Citations
Quality indicators
Journal
Polymer Degradation and Stability
Abstract
The kinetics of degradation of polysiloxanes with different starting chemistries is reported in this paper. The polymers used in the study were vinyl-terminated polydimethylsiloxane (PDMS) and poly(diphenyl-dimethyl)siloxane (3.5 and 25% diphenyl content, DP-3.5 and DP-25). These polymers were inert pyrolyzed under isothermal conditions at temperatures from 325 to 400 � C for 5 h. Additionally, these polymers were pyrolyzed under dynamic heating (rate 6.25 � C/min) up to 925 � C. The kinetic rate constants were calculated for each of the polymers, from both isothermal TGA and dynamic, non-isothermal TGA. The Van Krevelen and Coats-Redfern methods of analysis were used for calculating the energy of activation from dynamic TGA. The various analysis