间规聚苯乙烯的非等温结晶及其动力学  

Kinetic Study of the Nonisothermal Crystallization of Syndiotactic Polystyrene

作　　者：李海鹏[1,2] 沈家瑞[1,2] 祝方明[1,2] 

机构地区：[1]华南理工大学材料学院高分子系 [2]中山大学高分子研究所

出　　处：《应用化学》1999年第2期27-30,共4页Chinese Journal of Applied Chemistry

摘　　要：用差示扫描量热分析研究了间规聚苯乙烯（ｓＰＳ）的非等温结晶及其动力学，并分别用Ｏｚａｗａ和Ｊｅｚｉｏｒｎｙ两种方法来处理ｓＰＳ的非等温结晶数据．结果表明，在２５～４０℃／ｍｉｎ的冷却速率范围内，ｓＰＳ的半结晶时间随冷却速率增大而呈指数式下降，ｓＰＳ非等温结晶过程遵循Ｏｚａｗａ动力学方程，但不符合Ｊｅｚｉｏｒｎｙ方法中的Ａｖｒａｍｉ动力学方程．所得到的ｓＰＳ非等温结晶Ａｖｒａｍｉ指数ｎ在３６～４１之间。The nonisothermal crystallization and its kinetics of syndiotactic polystyrene(sPS) have been studied by DSC technique. The methods of Ozawa and Jeziorny for nonisothermal crystallization are applied to analyse the DSC data. It is found that the halftime of sPS crystallization decreases as an exponential function of the cooling rate ranged from 2.5 to 40 /min. The nonisothermal crystallization of sPS follows the Ozawa equation, but fails to agree with the Avrami equation in the Jeziorny method. The values of the Avrami exponent determined by the Ozawa equation are between 3641, higher than those reported values obtained by means of isothermal methods.

关 键 词：间规聚苯乙烯 非等温 结晶动力学 DSC 聚苯乙烯 

分 类 号：O632.13[理学—高分子化学]