通过长链分支诱导的界面约束,大大提高了环保型聚烯高压绝缘的爬行阻力和热衰老稳定性

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Updated: Jun 27, 2025

07:48

Artificial Thermal Ageing of Polyester Reinforced and Polyvinyl Chloride Coated Technical Fabric

Published on: January 29, 2020

6.6K

Kangning Wu¹, Haoran Sui¹, Zichao Yang¹

¹State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Shaanxi 710049, China.

ACS macro letters

|April 29, 2024

概括

这项研究引入了一种具有长链分支结构的新型聚烯复合材料,可显著改善高温爬行和高压电缆绝缘应用的耐热衰老性能.

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:

基于聚烯 (PP) 的复合材料对高压绝缘有希望,比交联聚乙烯 (XLPE) 有优势.
聚烯的关键局限性包括对高温爬行和热老化的抗性差,阻碍了实际使用.

研究的目的:

为了提高聚烯基复合材料的高温爬行和热老化阻力,用于高压绝缘.
合成和表征具有多重长链分支 (LCB) 结构的冲击聚烯共聚合物 (IPC).

主要方法:

冲击聚烯共聚合物 (IPC) 的合成,具有长链分支 (LCB) 结构.
在90°C时评估爬行应变和不可恢复的变形.
在135°C进行长时间的热老化实验.

主要成果:

合成的LCB-IPC在极端条件下显著增强了结构稳定性.
与没有LCB的IPC相比,LCB-IPC在90°C时表现出24.1%较少的爬行应变和75.2%较少的不可恢复的变形.
与IPC相比,LCB-IPC的热衰老寿命比IPC长133%,表明其在135°C下对降解的抵抗性得到了改善.
分析显示,LCB-IPC中形成了一个界面层,通过LCB结构连接PP矩阵和相的化学键.

结论:

纳入LCB结构有效地提高了聚烯复合材料的机械和热稳定性.
性能提升归因于LCB诱导的界面粘合导致的微层阶段的强制约束.
这种环保的LCB-IPC热塑性隔热为高压电缆应用提供了可行的替代方案.

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