溶剂蒸气对聚对苯二甲酸乙二酯作用的差示扫描量热研究

EFFECTS OF VAPOUR OF ORGANIC SOLVENTS ON POLY (ETHYLENE TEREPHTHALATE) BY THE DIFFERENTIAL SCANNING CALORIMETRY

用差示扫描量热(DSC)研究了几种有机溶剂蒸气对聚对苯二甲酸乙二酯(PET)的作用,表明可分为反应性的和非反应性的两种。同时,对于非反应性的作用,依冷结晶峰面积的变化,又可分为三种类型:冷结晶峰面积不变,经诱导期后下降,无诱导期而迅速下降。双冷结晶峰现象在一些非反应性溶剂处理过的PET试样的DSC曲线也观察到。

Effects of vapour of organic solvents on the poly-(ethylene terephthalate) (PET) was studied by the differential scanning calorimetry (DSC). It is shown that solvents may be classified by its effect into the active solvent and unactive solvent, and then, according to change of cold crystal peak area, effects of unactive solvents on the PET may be classified into three types: unchanged, reduced behind time and quickly reduced. Duplex cold crystal peak was also observed in the DSC of PET by vapour of unactive solvents.