量化紫外线老化LDPE电缆绝缘的依赖时间的结构和机械性能
Abdallah Hedir1, Ferhat Slimani1, Mustapha Moudoud1
1Laboratoire des Technologies Avancées en Génie Electrique (LATAGE), Université Mouloud Mammeri, Ouzou, Algérie.
Turkish journal of chemistry
|August 4, 2023
概括
紫外线 (UV) 光辐射降解低密度聚乙烯 (LDPE) 电缆绝缘,改变其性能. 这种降解涉及交叉连接和链裂的竞争过程,影响材料性能.
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:
- 低密度聚乙烯 (LDPE) 被广泛用于电缆绝缘.
- 暴露于紫外线 (UV) 辐射等环境因素会降低聚合物的性能.
- 了解UV诱导的降解对于材料的寿命和性能至关重要.
研究的目的:
- 研究紫外线辐射对LDPE电缆绝缘材料的物理化学,电气和机械性能的影响.
- 描述紫外线老化LDPE样本的结构和形态变化.
- 在紫外线暴露下识别竞争的降解机制 (交叉连接和链分裂).
主要方法:
- 一些LDPE电缆绝缘的样本被暴露在紫外线辐射中.
- 使用减弱总反射里埃变换红外光谱 (ATR-FTIR),X射线衍射 (XRD),扫描电子显微镜 (SEM) 和原子力显微镜 (AFM) 进行了结构和形态分析.
- 评估了物理化学,电气 (介电强度),机械 (破裂时的延伸,抗拉强度) 和光学性能.
主要成果:
- 紫外线照射导致LDPE的显著结构降解.
- 物理性质的变化表明了材料的恶化.
- 分析技术揭示了结构和形态特征的变化.
- 交叉连接和链分裂都被确定为UV老化过程中的竞争过程.
结论:
- 紫外线辐射显著影响LDPE电缆绝缘的性能.
- 降解过程是复杂的,涉及交叉连接和链分裂.
- 这些发现对于预测LDPE电缆材料的使用寿命和改善LDPE电缆材料的抗UV性能至关重要.
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