聚丙烯
材料科学
战术性
聚乙烯
共聚物
空间电荷
形态学(生物学)
相(物质)
电阻率和电导率
复合材料
高分子化学
化学工程
聚合物
电子
化学
聚合
电气工程
工程类
物理
有机化学
生物
量子力学
遗传学
作者
Jun‐Wei Zha,Hongda Yan,Weikang Li,Zhi‐Min Dang
摘要
Polypropylene (PP) has become one promising material to potentially replace the cross-link polyethylene used for high voltage direct current cables. Besides the isotactic polypropylene, the block polypropylene (b-PP) and random polypropylene (r-PP) can be synthesized through the copolymerization of ethylene and propylene molecules. In this letter, the effect of morphology and crystalline phases on the insulating electrical properties of PP was investigated. It was found that the introduction of polyethylene monomer resulted in the formation of β and γ phases in b-PP and r-PP. The results from the characteristic trap energy levels indicated that the β and γ phases could induce deep electron traps which enable to capture the carriers. And the space charge accumulation was obviously suppressed. Besides, the decreased electrical conductivity was observed in b-PP and r-PP. It is attributed to the existence of deep traps which can effectively reduce the carrier mobility and density in materials.
科研通智能强力驱动
Strongly Powered by AbleSci AI