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Temperature and Electric Field Dependence of Conduction in Low-Density Polyethylene

机译:低密度聚乙烯中导电的温度和电场依赖性

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摘要

A traditional constant voltage conductivity test method was used to measure how the conductivity of highly insulating low-density polyethylene (LDPE) polymer films depends on applied electric field, repeated and prolonged electric field exposure, and sample temperature. The strength of the applied voltage was varied to determine the electric field dependence. At low electric field, the resistivity was measured from cryogenic temperatures to well above the glass transition temperature. Comparisons were made with a variety of models of the conduction mechanisms common in insulators, including transient polarization and diffusion and steady-state thermally activated hopping conductivity and variable range hopping conductivity, to determine which mechanisms were active for LDPE and to provide a better picture of its electrical behavior.
机译:传统的恒压电导率测试方法用于测量高度绝缘的低密度聚乙烯(LDPE)聚合物膜的电导率如何取决于施加的电场,反复和长时间的电场暴露以及样品温度。改变施加电压的强度以确定电场依赖性。在低电场下,可测量从低温到远高于玻璃化转变温度的电阻率。对绝缘子中常见的各种传导机制模型进行了比较,包括瞬态极化和扩散以及稳态热激活跳变电导率和可变范围跳变电导率,以确定哪些机制对LDPE有效,并提供了更好的信息。它的电行为。

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