引用本文:
张兴元, 张贤, 周漪琴, 章吉祥. 取向PET薄膜偶极热松弛的研究[J]. 应用化学,
1988, 5(2): 44-47.
Citation: Zhang Xingyuan, Zhang Xian, Zhou Yiqin, Zhang Jixiang. STUDY OF THERMAL DEPOLARIZATION OF DIPOLES IN ORIENTED PET FILMS[J]. Chinese Journal of Applied Chemistry, 1988, 5(2): 44-47.
Citation: Zhang Xingyuan, Zhang Xian, Zhou Yiqin, Zhang Jixiang. STUDY OF THERMAL DEPOLARIZATION OF DIPOLES IN ORIENTED PET FILMS[J]. Chinese Journal of Applied Chemistry, 1988, 5(2): 44-47.
取向PET薄膜偶极热松弛的研究
摘要:
用纵拉、先纵后横、纵-横-纵等拉伸方式得到了各种平面取向程度的PET薄膜。短路热释电流温谱显示α峰随平面取向度增大向高温线性移动。被冻结的大分子主链链段偶极热松弛活化能随反式构象含量增大呈线性下降。热松弛时间常数则随反式构象含量增大而增长。
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关键词:
- 聚对苯二甲酸乙二醇酯
- / 薄膜
- / 取向
- / 偶极热松弛
- / 构象
English
STUDY OF THERMAL DEPOLARIZATION OF DIPOLES IN ORIENTED PET FILMS
Abstract:
series of PET films with different degree of plannar orientation were obtained by uniaxial as well as biaxial stretching. The α peak of short-circuit thermally stimulated current was shifted to higher temperature when the degree of plannar orientation was increased. The activation energy of thermal depolarization of dipoles for main-chain segmental motion in amorphous regions was decreased linearly and the time constant τ0 of dipolar thermal relaxation was increased with the increase of the content of trans conformation.
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