Cross‐linked polyethylene (XLPE) is notable for its use as power cable insulation. Its longevity is limited by space charge buildup linked to impurities such as the byproducts left behind by the cross‐linking agent dicumyl peroxide (DCP). The goal of this work is to determine the impacts of these byproducts on charge trapping and detrapping in XLPE using the thermally stimulated depolarization current technique. XLPE with byproducts has one source of trapped charge, which originates from the byproducts. XLPE that was thermally treated via degassing exhibits two other sources of trapped charge, which are charge injection and dipolar relaxations. Oxidation from degassing was shown to control the trapping from these sources, which is useful knowledge for processing this material prior to its use. Reintroducing acetophenone, one of the major byproducts of DCP, suppresses those two peaks once more, showing that it controls the overall space charge buildup characteristics in XLPE.

中文翻译：

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交联聚乙烯的热激发去极化电流谱及交联副产物的影响

交联聚乙烯（XLPE）以其作为电源电缆绝缘层而著称。它的寿命受到与杂质（如交联剂过氧化二枯基（DCP）留下的副产物）相关的空间电荷积累的限制。这项工作的目的是使用热激发去极化电流技术确定这些副产物对XLPE中电荷俘获和去俘获的影响。带有副产物的XLPE具有一种捕获电荷的来源，该电荷来源于副产物。通过脱气进行热处理的XLPE表现出另外两种捕获电荷的来源，即电荷注入和偶极弛豫。研究表明，脱气氧化可控制这些来源的捕集，这对于在使用该材料之前进行处理是有用的知识。重新引入苯乙酮