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Citation: Zhang Xingyuan, Zhou Yiqin. MOLECULAR MOTION AND TRAP PROPERTIES OF CRYSTALLIZED POLY (ETHYLENE TEREPHTHALATE) ELECTRETS[J]. Chinese Journal of Applied Chemistry, ;1992, 9(5): 70-73. shu

MOLECULAR MOTION AND TRAP PROPERTIES OF CRYSTALLIZED POLY (ETHYLENE TEREPHTHALATE) ELECTRETS

Zhang Xingyuan ^1,, ,
Zhou Yiqin ²

1.
1. Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026;
2.
2. Department of Chemistry, Qingdao University, Qingdao

Corresponding author: Zhang Xingyuan,
Received Date: 25 February 1991
Available Online: 24 February 1992

A series of PET films with different crystallinity (X_c) have been made through annealing at 110℃. The α-peak of short-circuit thermally stimulated current (corresponding to Tg) shifted to the higher temperature region when Xe increased. With the rise of X_c, the activation energy of dipolar thermal relaxation for main chain segmental motion in amorphous phase decreased linearly and the time constant of dipolar thermal relaxation increased exponentially.Crystallization by annealing leads to the increase of the trap depth, but the ability to trap charge carriers showed a maximum when Xe was 22%.
- poly(ethylene terephthalate),
- crystallization,
- thermally stimulated current,
- molecular motion,
- trap
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