Abstract
A theoretical macrokinetic model for the crystallization of polyphenylene sulphide (PPS) matrix for high performance composites is presented. The model, accounting for the induction time due to nucleation, is able to predict crystallization changes in isothermal and non-isothermal conditions, including cold and melt crystallization, and quenching effects. Moreover, a simple expression is proposed for the temperature dependence of the kinetic constant allowing a straightforward calculation of model parameters. Theoretical results are in good agreement with calorimetric experimental data obtained in a wide range of thermal conditions. Time temperature transformation plots, constructed from the model developed for isothermal (TTT) and non-isothermal (CCT) conditions, are presented providing a fundamental tool for understanding the crystallization behaviour of semicrystalline matrices and to determine the most appropriate processing conditions.
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