STUDY OF THERMAL DEPOLARIZATION OF DIPOLES IN ORIENTED PET FILMS

Chinese Journal of Applied Chemistry ›› 1988, Vol. 0 ›› Issue (2): 44-47.

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STUDY OF THERMAL DEPOLARIZATION OF DIPOLES IN ORIENTED PET FILMS

Zhang Xingyuan¹, Zhang Xian², Zhou Yiqin³, Zhang Jixiang³

1. Department of Applied Chemistry, University of Science and Technology of China, Hefei;
2. Institute of Chemistry, Academia Sinica;
3. Department of Chemistry, Oingdao University

Received:1987-01-15 Revised:1987-03-31 Published:1988-04-10 Online:1988-04-10

Abstract

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 τ_o of dipolar thermal relaxation was increased with the increase of the content of trans conformation.

Key words: Polyethylene, glycol terephthalate, Film orientation, Dipolar thermal, relaxatton, Conformation

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, 0(2): 44-47.

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STUDY OF THERMAL DEPOLARIZATION OF DIPOLES IN ORIENTED PET FILMS

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