聚苯乙烯热降解动力学研究

THE STUDY OF DYNAMIC OF POLYSIYRENE'S THERMAL DEGRATION

研究了不同分子量聚苯乙烯在氮气气氛下不同升温速率的热分解动力学，认为聚苯乙烯的热分解动力学机制模型为D3和A0.6模型，即为扩散控制和咸核及生长机理。结果表明，不同聚苯乙烯的活化能在155．49KJ～256．36KJ之间，其活化能和热稳定性受分子量的影响。

The clynamic of ps's decomposition with various moleculer weight was studied at diffrent heating rate in the fluid of N2. It has been found the models of ps's thermal degration is D3 and A0.6, it was to say that the reaction kinetics is based on diffusion mechanism and random nucleation and growth of nuclei mechanism. The activation energe of Ps was at tile vange of 155 .49KJ^256. 36KJ. It has also been found that the activation energes and the degration mechanism varies with molecular weight.