摘要
聚丙烯(PP)具有出色的热稳定性、绝缘性、可回收再利用和无需交联等优势,是可替代交联聚乙烯(XLPE)的高压直流电缆绝缘材料,但无法直接应用于高压电缆绝缘。为此从PP的结构特性出发,综述了几种常用于PP的改性方法研究进展,分别论述了共混改性、纳米颗粒掺杂改性和成核剂改性对PP力学性能和电气性能的改进。采用弹性体共混改性可以增强PP的低温韧性,减小刚性;纳米掺杂抑制了PP电树枝生长及空间电荷积聚,大幅提升PP介电性能;β成核剂的加入形成了松散结构的β球晶可以提升PP韧性。最后,对PP改性研究现状做出总结。
Polypropylene(PP) is an alternative to cross-linked polyethylene(XLPE) for high voltage DC cable insulation because of its excellent thermal stability, insulation, recyclability and no crosslinking. However, polypropylene can not be directly applied to the insulation of high-voltage cables. Therefore, starting from the structural characteristics of PP, expounds the research progress of several modification methods commonly used in polypropylene materials. The effects of blending modification, nano doping modification and nucleating agent modification on the mechanical or electrical properties of polypropylene were discussed. Elastomer blending modification can enhance the low-temperature toughness of PP and reduce the rigidity;Nano doping inhibits the growth of electrical dendrites and space charge accumulation of PP, and greatly improves the dielectric properties of PP;Loosely structured β Spherulite formed by the addition of nucleating agent β can improve the toughness of PP. In the end, the research status of PP modification is summarized.
作者
陈少杰
惠卓斌
李欢
CHEN Shao-jie;HUI Zhuo-bin;LI Huan(School of Electrical Engineering,Shaanxi University of Technology,Hanzhong 723000,China)
出处
《陕西理工大学学报（自然科学版）》
2023年第1期27-36,共10页
Journal of Shaanxi University of Technology:Natural Science Edition
基金
陕西省教育厅一般专项计划项目(22JK0322)。
关键词
电缆绝缘
聚丙烯
共混
纳米掺杂
成核剂改性
cable insulation
polyethylene
blending
nano doping
nucleating agent modification
