Thermally stimulated depolarization current studies on PC/PTBF blends
Thermally stimulated depolarization current studies on PC/PTBF blends
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PC/PTBF 共混物的热刺激去极化电流研究
DOI：
10.1002/app.1994.070541218
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发表时间：
1994
影响因子：
3
通讯作者：
S. Chandra
中科院分区：
文献类型：
--
作者：
A. K. Kalkar;S. Kundagol;S. Chand;S. Chandra
在348°K ~ 383°K温度范围内，用电极极化法研究了聚碳酸酯（PC）和聚对叔丁基苯酚甲醛（PTBF）共混物的热激去极化电流（TSDC）。在相同电场（Ep）和温度（Tp）下极化的PC/PTBF共混物的极化率（一般在300°K ~ 450°K范围内）呈连续分布，并具有与共混物组成相关的单峰（TM）。随着Ep和Tp的增加，共混物的TSDC峰随着与峰相关联的峰值电流（IM）和电荷（Q）的增加而向更高的温度偏移。极化场和温度的影响表明，共混体系中的极化是由于诱导偶极子的形成。活化能随共混物中PTBF含量的增加而降低，表明PC/PTBF驻极体中存在浅陷阱。然而，与其两种组分PC和PTBF相比，本共混驻极体储存更多的电荷但衰减更快。John Wiley & Sons，Inc.
Thermally stimulated depolarization current (TSDC) studies have been carried out on blends of polycarbonate (PC) and poly(p-t-butyl phenolformaldehyde) (PTBF) using electric poling at temperatures ranging from 348°K to 383°K. The PC/PTBF blends poled at identical electric field (Ep) and temperature (Tp) exhibit a continuous distribution of polarizability (in general, in the range 300°K to 450°K) with a blend composition dependent single peak (TM). With increasing Ep and Tp, the TSDC peak of a blend shifts toward higher temperature with increasing peak current (IM) and charge (Q) associated with the peak. The effects of polarization field and temperature indicate that the polarization in the blend system is due to induced dipole formation. The activation energy decreases with increasing PTBF content in the blend, indicating shallow traps in PC/PTBF electret. The present blend electrets, however, comparative to its two components PC and PTBF, store more charge but decay faster. © 1994 John Wiley & Sons, Inc.