Space charge analysis in polyimide (kapton-H) samples

被引：7
|
作者：
Gaur, M. S. [1 ]
Ramlal [1 ]
Tiwari, R. K. [1 ]
机构：
[1] Hindustan Coll Sci & Technol, Dept Phys, Mathura 281122, Uttar Pradesh, India
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2010年 / 101卷 / 03期
关键词：
FTSDC; Space charge; Apparent activation energy; Glass transition temperature; Charge transport; DEPOLARIZATION CURRENTS; MOLECULAR MOBILITY; POLYMERS; DIELECTRICS; ELECTRETS; DENSITY;
D O I：
10.1007/s10973-010-0676-1
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The space charge trapping/detrapping in thermally charged polyimide (PI) samples have been studied by means of "Final Thermally Stimulated Discharge Current" (FTSDC). We investigate the effects associated with space charge behavior in PI near glass transition region. The FTSDC spectra consist of space charge peak attributed trapping of charges at different trapping levels. The peak positions are found to be very sensitive with poling time, discharging time, and heating rate. The apparent activation energy distributed in the range from 0.51 to 1.12 eV, and the charge released has been found to be varying with poling temperature (T (p)) and poling time (t (c))/discharging time (t (d)). The decay of space charge (Q) resembled an agreement with interfacial polarization.
引用
收藏
页码：1079 / 1084
页数：6
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