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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. shu

STUDY OF THERMAL DEPOLARIZATION OF DIPOLES IN ORIENTED PET FILMS

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

Received Date: 15 January 1987
Available Online: 31 March 1987

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.
- Polyethylene glycol terephthalate,
- Film orientation,
- Dipolar thermal relaxatton,
- Conformation,
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