有机改性热塑性绝缘材料的改进电气性能,用于直流电缆应用
Yunpeng Zhan1, Xu Yang2, Jiaming Yang2
1Electric Power Research Institute, China Southern Power Grid, Guangzhou 510663, China.
Polymers
|January 11, 2024
概括
styrene-maleic无水化共聚合物 (SMA) 通过引入深陷来增强可回收聚烯 (PP) 电缆绝缘. 这种修改改善了直流电气性能,并抑制了空间电荷,提供了更好的电场电阻.
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:
- 热塑性聚烯 (PP) 是直流电缆绝缘的关键材料.
- 提高PP绝缘的电气性能和可回收性对于先进的电力系统至关重要.
- 深陷改造是改善聚合物介电性能的一个有希望的策略.
研究的目的:
- 为了研究烯-烯无水化共聚合物 (SMA) 对聚烯 (PP) 基电缆绝缘材料的性能的影响.
- 评估SMA作为一种有机深陷修饰剂,用于增强直流电气性能.
- 评估SMA对PP绝缘材料空间电荷抑制和电场扭曲阻力的影响.
主要方法:
- 制备PP,PP/SMA,PP/乙烯-烯共聚合物 (POE) 和PP/POE/SMA绝缘样品.
- 介质形态学,晶体形态学和分子结构的全面表征.
- 在不同温度 (30,50,70°C) 下测试直流电气性能.
- 使用热刺激脱极化电流 (TSDC) 和量子化学计算进行分析.
- 使用双极载波运输模型对同轴电缆进行空间电荷分布的模拟.
主要成果:
- SMA在PP中均分散,对PP的晶体形态产生最小的影响.
- 引入SMA可以改善PP和PP/POE系统中的直流电气性能.
- SMA在材料中创建了深层陷,增强了直流特性.
- 在PP和PP/POE绝缘中,SMA显著抑制空间电荷的积累.
- 用SMA修改的材料表现出极好的电场扭曲阻力.
结论:
- styrene-maleic anhydride copolymer (SMA) 作为一种有效的有机深陷修饰剂,用于基于聚烯 (PP) 的电缆绝缘.
- 在PP和PP/POE系统中,SMA的整合增强了DC电气性能和空间电荷抑制.
- SMA是开发高性能,可回收的直流电缆绝缘材料的有前途的添加剂.
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