Fast space charge behavior in heat-treated polypropylene films
Fast space charge behavior in heat-treated polypropylene films
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DOI：
10.1002/app.42235
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发表时间：
2015-07
影响因子：
3
通讯作者：
F. Zheng;Min Gu;Jian-Xin Dong;Z. An;Q. Lei;Yewen Zhang
中科院分区：
文献类型：
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作者：
F. Zheng;Min Gu;Jian-Xin Dong;Z. An;Q. Lei;Yewen Zhang
为了研究热处理对极化双向拉伸聚丙烯(BOPP)薄膜快空间电荷行为的影响，提出了用几百纳秒内短路电流的表征方法来表征BOPP薄膜中的快空间电荷行为。在样品制备过程中，BOPP薄膜被快速或缓慢地冷却。所有极化薄膜样品的短路电流都表现出衰减的振荡特征，但快速冷却制备的样品的振荡电流周期减小得更快。通过热脉冲(TP)测量，观察到极化后的BOPP薄膜中的双极空间电荷注入。短路电流的变化特征被认为与快空间电荷行为的变化有关，而快空间电荷行为取决于样品制备过程中热处理所改变的不同的结构陷阱。热刺激电流法显示，快速冷却的样品具有相对较浅的陷阱能级，这导致样品中逃逸电荷的迁移率较高。利用TP测量分析了极化后的BOPP薄膜的空间电荷特性。©2015威利期刊公司J.应用。波兰姆。SCI。2015年，132.42235。
In this study, the characterization of the short-circuit current within hundreds of nanoseconds is proposed to study the effect of heat treatment on fast space charge behavior in the polarized biaxially oriented polypropylene (BOPP) films. The BOPP films were cooled either quickly or slowly during the sample preparation. The damped oscillating feature was found in the short-circuit current of all the polarized film samples, but the periods of the oscillating current for the samples prepared by fast cooling rate decrease faster. Bipolar space charge injection in the polarized BOPP films was observed by the thermal pulse (TP) measurement. The variation feature of the short-circuit current was considered to be associated with the varying fast space charge behavior, which depended on the varying structural traps modified by the heat treatment during the sample preparation. The sample subjected to fast cooling process was with relatively shallow trap level revealed by the thermally stimulated current method, which led to higher mobility of the escaping charge in the sample. The TP measurements were utilized to analyze space charge features in the polarized BOPP films. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42235.