In this paper, we propose a method for characterizing the trap energy distribution of polymers. The method can accurately extract the de-trapping current from the polarization current of the sample, thus overcoming the accuracy problem of the traditional isothermal relaxation current (IRC) method. Further application of this method on crosslinked polyethylene (XLPE) sheet samples revealed the effect of thermal degradation degree on the trap distribution of XLPE. At the recrystallization stage as polyethylene becomes re-crosslinked, the number of traps decreases. At the thermal-oxidative aging stage as the sample is seriously damaged, the number of traps increases. The de-trapping current of the sample thus exhibits a first decreasing and then increasing trend.

中文翻译：

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电场激励去极化电流法实现聚合物中陷阱能量分布的定量评价


在本文中，我们提出了一种表征聚合物陷阱能量分布的方法。该方法能够准确地从样品的极化电流中提取去俘获电流，从而克服了传统等温弛豫电流（IRC）方法的精度问题。将该方法进一步应用于交联聚乙烯 (XLPE) 片材样品，揭示了热降解程度对 XLPE 陷阱分布的影响。在再结晶阶段，随着聚乙烯重新交联，陷阱的数量减少。在热氧化老化阶段，随着样品损伤严重，陷阱的数量增加。因此样品的去俘获电流表现出先减小后增大的趋势。