ETFE公司
Kapton
低密度聚乙烯
俘获
电荷密度
空间电荷
电场
材料科学
聚乙烯
聚合物
化学
原子物理学
化学物理
分子物理学
分析化学(期刊)
电子
聚酰亚胺
纳米技术
物理
有机化学
复合材料
生态学
量子力学
生物
图层(电子)
作者
Tatsuo Takada,H. Kikuchi,Hiroaki Miyake,Yasuhiro Tanaka,M. Yoshida,Yuji Hayase
出处
期刊:IEEE Transactions on Dielectrics and Electrical Insulation
[Institute of Electrical and Electronics Engineers]
日期:2015-04-01
卷期号:22 (2): 1240-1249
被引量:117
标识
DOI:10.1109/tdei.2015.7076827
摘要
We studied the trapping of positive and negative charges in the chemical structures of polymers under a high electric field using a space charge measurement system. Positive charges accumulated in low-density polyethylene (LDPE), whereas positive and negative charges accumulated in polyimide (Kapton) and also in ethylene tetrafluoroethylene (ETFE) subjected to electron beam irradiation. To determine the charge-trapping sites in the chemical structures, a quantum chemical calculation was carried out using Density Function Theory (DFT) with Gaussian 09. The relationship between the energy band and the isosurface of orbital electrons at various energy levels was obtained. A three-dimensional (3D) electrostatic potential distribution map was obtained for positively and negatively charged polymers to determine the relationship between a trapping site and the charge accumulation center in the 3D potential distribution map. Positive and negative charges in Kapton and ETFE films are trapped in trapping sites in chemical structures and the positive charges in an LDPE film are trapped in physical defects.
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