本文用SALS法研究了用四种催化剂和不同稳定剂催化缩聚制得的十多种PET试样在等温结晶过程中的结晶行为;证明所研究的PET样品基本上为非均相成核的结晶机理,其后球晶按三维方向等速生长;用SALS法测定了各种PET样品的球晶生长线速度,从而计算出相应的总结晶速率常数与 Avrami 指数,所得结果与文献中用其他方法测得的数据比较接近。 In this paper, the SALS method was used to study the crystallization behavior of more than ten PET samples prepared by the polycondensation catalyzed by four catalysts and different stabilizers. It is proved that the PET samples studied are essentially heterogeneous nucleated crystals Mechanism, followed by spherulites in three-dimensional growth at constant speed; SALS method was used to determine the spherulite growth rate of various PET samples to calculate the corresponding total rate constant and the Avrami index, the results obtained in the literature by other methods The measured data is relatively close.