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Thermally stimulated depolarization currents in poly(2,6-dimethyl-1,4-phenylene oxide) films

✍ Scribed by A. K. Kalkar; Shankar Kundagol; Suresh Chand; Subhas Chandra

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
529 KB
Volume
61
Category
Article
ISSN
0021-8995

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✦ Synopsis

Electrical properties of poly (2,6-dimethyl-1,4-phenylene oxide) (PPO) have been studied by measuring thermally stimulated discharge currents. Depolarization behavior of poled PPO film exhibits temperature-and time-dependent single relaxation around 468 K which is attributed to dipole reorientation. The peak maxima, however, shifts from 468 K to 484 K with increasing poling temperature. This indicates that the peak has a distribution of relaxation times. The polarization in semicrystalline PPO is found to decay slowly, indicating that the overall dipoles are more stable in comparison to amorphous PPO; hence, crystalline PPO forms comparatively stable electrets.

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