Poly(p-phenylene sulfide) isothermal cold crystallization investigated by usual and unusual methods

In this paper we want to report the results obtained in our study of the cold-crystallization kinetics of PPS samples quenched from the melt state and analyzed in the crystallization temperature range 90-112 degreesC, Such a wide range was explored by employing three different experimental techniques: the first one was the usual Scanning Calorimetry (DSC), for the highest temperature range, the second and third ones were the less conventional FT-IR spectroscopy and energy dispersive X-ray diffraction (EDXD), able to explore the lowest temperature range, The experimental data obtained by the three above mentioned methods have been all together analyzed by means of the Avrami equation. FT-IR and EDXD have also allowed us to study the secondary crystallization process of PPS, which otherwise could not be observed just with the DSC technique. The overall crystallization process of such a polymer has been interpreted in the light of the model proposed by Ravindranath and Jog to explain the crystallization of the polymer from the melt state. Document Type: Article