Effect of structural relaxation of glassy PET on crystallization process observed by the simultaneous DSC-XRD and DSC-FTIR

被引：14

作者：

Yoshii, T ^{[1
]}

Yoshida, H ^{[1
]}

Kawai, T ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Grad Sch Engn, Dept Appl Chem, Tokyo 1920397, Japan

来源：

THERMOCHIMICA ACTA | 2005年 / 431卷 / 1-2期

关键词：

poly(ethylene terephtalate) (PET); enthalpy relaxation; nucleation; cold-crystallization; conformation;

D O I：

10.1016/j.tca.2005.01.070

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The effect of structural relaxation of the glassy poly(ethylene terephtalate) (PET) caused by annealing below its glass transition temperature (T-g) on the cold-crystallization observed was investigated by the simultaneous DSC-FTIR and DSC-XRD methods. The nucleation and the conformational ordering processes proceeded faster by annealing. From the relationship between the absorbance change and the exothermic heat during the cold-crystallization, the heat of cold-crystallization for the unannealed PET was caused mainly by the conformational ordering. For the annealed PET, the long range ordering contributed to the heat of crystallization in the late stage of cold-crystallization, which was also confirmed by the DSC-XRD method. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：177 / 181

页数：5