Abstract:

In order to investigate the thermal degradation kinetics of Polyphenylene Sulfide (PPS) fibers, performance of PPS fibers were analyzed at certain heating rates in nitrogen by means of thermogravimetry. The kinetic parameters of PPS fibers were obtained according to Kissinger，Flynn-Wall-Ozawa and Friedman methods. In addition, thermal stability of PPS fibers was also investigated. It was found that both the initial decomposition temperature and the temperature at maximal thermal degradation rate increase with the increase of heating rate. The activation energy E, reaction order n and pre-exponential factors A of PPS fibers obtained by Flynn-Wall-Ozawa and Friedman methods are 185.0kJ/mol、1.21 and5.7×109 , respectively. The activation energy E and pre-exponential factors A of PPS fibers at maximal thermal degradation rate obtained by Kissinger methods are 228.3 kJ/mol and 2.9×109 respectively.