摘要
用热处理方法制得一系列具有不同结晶度的 PET 试样。热释电研究发现,结晶度小于5%时,陷阱深度加深较快;结晶度大于5%后,陷阱加深趋于缓慢。随结晶度提高,结晶结构的复杂化导致结构缺陷种类增多,分立陷阱数由非晶的2个增至4个。
A series of poly(ethylene terephthalate)(PET)films with different crystallinity areobtained by annealing at 11O℃ in various time intervals.It is found that the depth of trappinglevel increases with the rise of crystallinity according to the investigation of the thermally stimu-lated current.Due to the change and complexity of crystalline structure with crystallinity,thekinds of structural defects enlarge,resulting in the increase of the number of discrete trappinglevels.
关键词
驻极体
乙二醇酯
聚对苯二甲酸
poly(ethylene terephthalate)
thermally stimulated current
crystallinity
discrete trapping level
