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通过BMIE自由基启动接种修改的交联聚乙烯的改进直流介电性能

Peng Li¹, Xuan Wang¹, Jin Jin¹

¹Key Laboratory of Engineering Dielectrics and Its Application of Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China.

Materials (Basel, Switzerland)

|October 28, 2023

概括

在交联聚乙烯 (XLPE) 上植入双胺乙烯 (BMIE) 显著改善其直流 (DC) 介电性质,用于高压 (HV) 电缆. 这种修改通过创建深陷来增强绝缘,减少空间电荷积累,并增加断裂强度.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
电气工程电气工程

背景情况:

交联聚乙烯 (XLPE) 是高压电缆绝缘的关键材料.
提高XLPE的直流 (DC) 介电性质对于提高HV电缆性能和可靠性至关重要.
传统的修改,比如使用马氏无水化物 (MAH),在加工和有效性方面存在局限性.

研究的目的:

为了研究在聚乙烯分子链上植入双胺乙烯 (BMIE) 的有效性,以增强XLPE的直流介电性质.
评估BMIE接种对XLPE绝缘材料电阻,空间电荷积累和断裂强度的影响.
为了比较BMIE的性能与传统的修饰剂,如胺无水化物 (MAH).

主要方法:

在聚乙烯上植入双胺乙烯 (BMIE).
红外光谱和凝含量测试以确认成功接种并评估交叉连接程度.
在不同温度下分析直流分解场强度,电流密度和空间电荷分布.
了解陷形成的机制的第一原则计算.

主要成果:

BMIE成功地被移植到聚乙烯分子链上,而不会影响交叉连接程度.
BMIE接种减少了对交叉连接器的需求,并最大限度地减少了副产品对电阻的影响.
经过修改的XLPE (XLPE-g-BMIE) 显示出明显增强的直流介电特性,包括更高的断裂场强度和减少空间电荷积累.
在BMIE中,极点组创造了深陷能量水平,增加了电荷注入屏障,减少了电荷载体的移动性.

结论:

接种BMIE是一种可行且有效的方法,可以增强XLPE用于HV电缆绝缘的直流介电特性.
增强的介电特性归因于创建深层载体陷和减少空间电荷积累.
这项研究为开发HVDC电缆的先进材料提供了一个有希望的新方向.

关键词:

乙烯 (乙) 是一种有氧化物.携带者陷携带者陷携带者陷交叉链接聚乙烯的交叉链接聚乙烯.自由基是自由基的重要组成部分.空间充电空间充电

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