A remarkable suppression on space charge in isotatic polypropylene by inducing the β-crystal formation
A remarkable suppression on space charge in isotatic polypropylene by inducing the β-crystal formation
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DOI：
10.1063/1.4930938
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发表时间：
2015-09
影响因子：
4
通讯作者：
Yun-Hui Wu;J. Zha;Weikang Li;Si-Jiao Wang;Z. Dang
中科院分区：
文献类型：
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作者：
Yun-Hui Wu;J. Zha;Weikang Li;Si-Jiao Wang;Z. Dang
本文报道了用成核剂N，N‘-二环己基对苯二甲酰胺(DCTH)促进β晶体的生长，显著抑制了等规聚丙烯(IPP)中的空间电荷。分析了iPP中的α-和β-晶体，研究了它们对空间电荷和陷阱能级分布的影响。结果表明，DCTH(0.1wt.%)的掺杂对β微晶团簇的形成有很大的影响，使β微晶(β-c)的含量从0%显著增加到83.2%。与分散的α微晶相比，β晶体的生长有效地抑制了空间电荷的积累。认为深陷阱极大地削弱了iPP材料中载流子的迁移率。
This letter reports a significant suppression on space charge in isotatic polypropylene (iPP) by inducing the growth of β-crystal doped with the nucleating agent N,N′-dicyclohexylterephthalamide (DCTH). The α- and β-crystals in iPP were analyzed, and their effect on space charge and distribution of trap level was studied. Results indicated that the doping of DCTH (0.1 wt. %) had great effect on the formation of the microcrystallite clusters of β-crystal, which makes the fraction of β microcrystallite (βc) markedly an increase from 0% to 83.2% in iPP. Compared to the dispersed microcrystallites of α-crystal, the growth of β-crystal effectively suppressed the space charge accumulation. It would attribute that the deep traps greatly weakened the mobility of charge carrier in iPP material.