Kinetic equations for thermal degradation of polymers

Details Kinetic equations for thermal degradation of polymers Kinetic equations for thermal degradation of polymers

2003-09-29

arxiv.org/abs/cond-mat/0309677v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1088/0965-0393/12/4/002

Kinetic equations are analyzed for thermal degradation of polymers. The governing relations are based on the fragmentation-annihilation concept. Explicit solutions to these equations are derived in two particular cases of interest. For arbitrary values of adjustable parameters, the evolution of the number-average and mass-average molecular weights of polymers is analyzed numerically. Good agreement is demonstrated between the results of numerical simulation and experimental data. It is revealed that the model can correctly predict observations in thermo-gravimetric tests when its parameters are determined by matching experimental data for the decrease in molecular weight with exposure time.

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