调查硬度对聚氨介电分解特性硬度的影响
Abdul Samad1, Wah Hoon Siew1, Martin Given1
1Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XQ, U.K.
ACS omega
|June 17, 2024
概括
聚氨 (PU) 显示了增强的介电分解强度与更高的硬度,对于高压绝缘至关重要. 然而,更硬的PU降低了自我修复能力,需要对可靠的绝缘系统进行平衡.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
背景情况:
- 聚合物材料对于高压绝缘至关重要,但随着时间的推移而降解,导致故障.
- 聚合物中的空隙会产生不同的电场,加剧了绝缘问题.
- 聚氨 (PU) 具有自我愈合特性,可以修复空隙并保持绝缘的完整性.
研究的目的:
- 研究不同硬度水平 (海岸40°,70°,90°) 的聚氨 (PU) 的介电分解特性.
- 探索PU硬度与其介电性质之间的关系,包括AC/DC断裂强度和介电光谱.
- 评估PU中介电强度和自我修复能力之间的权衡,用于高压应用.
主要方法:
- 合成的PU材料具有三个不同的硬度级别 (海岸40°,70°,90°).
- 在PU样本上进行了交流和直流介电分解试验.
- 分析介电光谱,以了解材料在电压下的行为.
主要成果:
- 在交流和直流条件下,PU的介电分解强度随着材料硬度的增加而显著增加.
- 较硬的PU变种 (Shore 90°) 与较软的变种 (Shore 40°,70°) 相比,具有更高的介电强度.
- 一个潜在的权衡存在,因为增加的硬度可能会降低PU的自我愈合能力.
结论:
- 材料硬度是影响PU用于高压绝缘的介电分解强度的关键因素.
- 优化PU用于高压应用需要平衡增强介电强度与保留的自我修复能力.
- 这些发现为研究人员和工程师设计先进的聚合物绝缘系统提供了必不可少的数据.
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