Research on Aging Performance and Mechanism Analysis of Cross-linked Polyethylene Wire and Cable Materials

2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM) Pub Date : 2021-07-12 DOI:10.1109/ICPADM49635.2021.9493966

Tian Chongjun, Daolin Ye, W. Xing

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引用次数: 3

Abstract

Cross-linked Polyethylene (XLPE) shows excellent insulation performance and heat resistance, resulted to widely using in various wire and cable materials. Due to the extensive using of XLPE, the anti-aging performance of XLPE has attracted a lot of attention. In this paper, the different effects of thermal aging and xenon lamp aging on the material surface are studied. Fourier Transform Infrared and Pyrolysis-Gas chromatography-mass spectrometry were used to analyze the aging mechanism of XLPE. Tensile test, Volume Resistivity test and Surface Resistivity test are used to evaluate the mechanical and electric properties, respectively. The results can be summarized as: (a) The volume resistivity of XLPE was still higher than 1014 Ω·M after 14 days of high temperature thermal aging. (b) The molecular chain broken of XLPE occurs on the surface first. (c) Xenon lamp aging results show that free radical reactions induced by light promote the degradation of XLPE. (d) After Xenon lamp aging, XLPE macromolecular chain break into relatively uniform small molecular alkanes. The results could provide practical and theoretical support for the production and application of XLPE.

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交联聚乙烯电线电缆材料老化性能研究及机理分析

交联聚乙烯(XLPE)具有优良的绝缘性能和耐热性，广泛应用于各种电线电缆材料中。由于XLPE的广泛应用，XLPE的抗老化性能引起了人们的广泛关注。本文研究了热老化和氙灯老化对材料表面的不同影响。采用傅里叶变换红外和热解-气相色谱-质谱法对XLPE的老化机理进行了分析。用拉伸试验、体积电阻率试验和表面电阻率试验分别评价材料的力学性能和电性能。结果表明:(a)高温热老化14天后，XLPE的体积电阻率仍高于1014 Ω·M。(b) XLPE的分子链断裂首先发生在表面。(c)氙灯老化结果表明，光诱导的自由基反应促进了XLPE的降解。(d)氙灯老化后，XLPE大分子链断裂成相对均匀的小分子烷烃。研究结果可为XLPE的生产和应用提供理论和实践支持。

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2021 IEEE International Conference on the Properties and Applications of Dielectric Materials (ICPADM)

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