Premium
Thermally stimulated depolarization currents in poly(2,6‐dimethyl‐1,4‐phenylene oxide) films
Author(s) -
Kalkar A. K.,
Kundagol Shankar,
Chand Suresh,
Chandra Subhas
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960829)61:9<1431::aid-app1>3.0.co;2-k
Subject(s) - crystallinity , poling , phenylene , materials science , depolarization , amorphous solid , oxide , relaxation (psychology) , polarization (electrochemistry) , dipole , electret , analytical chemistry (journal) , polymer chemistry , composite material , polymer , dielectric , crystallography , optoelectronics , chemistry , organic chemistry , medicine , psychology , social psychology , metallurgy , ferroelectricity , endocrinology
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. © 1996 John Wiley & Sons, Inc.