Study of transient currents in discharging mode in pure and iodine doped ethyl cellulose films
作者:
P. K. Khare,
R. S. Chandok,
期刊:
Polymer International
(WILEY Available online 1995)
卷期:
Volume 36,
issue 1
页码: 35-40
ISSN:0959-8103
年代: 1995
DOI:10.1002/pi.1995.210360106
出版商: John Wiley&Sons, Ltd.
关键词: transient currents;ethyl cellulose;Curie–Von Schweidler law;Hamon approximation;dipolar orientation;space charge relaxation;charge transfer complex
数据来源: WILEY
摘要:
AbstractA study of transient currents in discharging mode in vacuum aluminized pure and iodine doped ethyl cellulose (EC) films, approximately 20 μm in thickness, measured at various temperatures (303–353K) and applied fields (2.0 × 104−4.5 × 104V/cm) is described. The order of current has been found to increase considerably with increase in poling temperature, field and iodine mixing. The currents have been found to showI ∝︁ t−n(i.e. Curie–Von Schweidler law) time dependence with different slopes in the short and long time regions. The conductivity of the films is increased on doping with iodine. The dopant molecules are considered to act as additional trapping centres and provide a link between the polymer molecules in the amorphous region, thus resulting in the formation of a charge transfer complex. The results of the experiments and the mechanisms involved are discussed on the basis of avai
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