In order to quantitatively analyze the interaction effects of crosslinking byproducts on charge characteristics in crosslinked polyethylene (XLPE), samples are prepared by soaking additive-free untreated polyethylene in three major byproducts, namely acetophenone (A), cumyl alcohol (C), and a-methylstyrene (M), and space charge measurement under relatively low electric fields of 3, 5, 7, and 10 kV/mm is carried out. The results show that the effect of C on space charge accumulation is comparable with that of A per unit byproduct content, and M exhibits the weakest effect. It is related to the different dissociation degrees of byproducts under different electric fields. An exponential fitting formula is proposed to clarify the significant synergistic and the antagonistic effects of the byproducts on charge accumulation. The synergistic effects on charge accumulation is obvious in LDPE-MC (LDPE soaked in the blend of M and C) at 3,7, and 10 kV/mm, but not at 5 kV/mm, and the LDPE-AC (LDPE soaked in the blend of A and C) shows the same rule at 5, 7, and 10 kV/mm, except for 3 kV/mm. The LDPE-AM (LDPE soaked in the blend of A and M) has antagonistic effects on charge accumulation at 5, 7, and 10 kV/mm, and shows a trend from synergistic effects to antagonistic effects at 3 kV/mm. For LDPE-ACM (LDPE soaked in the blend of A, C and M), synergistic effects are dominant at 3, 5 and 7 kV/mm, then antagonistic effects are obvious at 10 kV/mm. The different rule on space charge accumulation may be due to the discrepant charge injection under different electric fields according to the results of charge distribution with individual byproducts.

中文翻译：

---

三种主要交联副产物对聚乙烯空间电荷积累的相互作用影响


为了定量分析交联副产物对交联聚乙烯 (XLPE) 电荷特性的相互作用影响，通过将不含添加剂的未经处理的聚乙烯浸泡在三种主要副产物中来制备样品，即苯乙酮 (A)、枯醇 (C) 和-甲基苯乙烯(M)，并在3、5、7和10 kV/mm的相对低电场下进行空间电荷测量。结果表明，每单位副产物含量，C对空间电荷积累的影响与A相当，而M的影响最弱。这与不同电场下副产物解离程度不同有关。提出了指数拟合公式来阐明副产物对电荷积累的显着协同和拮抗作用。 LDPE-MC（LDPE 浸泡在 M 和 C 的混合物中）在 3,7 和 10 kV/mm 下对电荷积累的协同效应很明显，但在 5 kV/mm 下则不明显，LDPE-AC（LDPE 浸泡在 M 和 C 的混合物中）对电荷积累的协同效应很明显。 A 和 C 的混合物中）在 5、7 和 10 kV/mm 下表现出相同的规则，但 3 kV/mm 除外。 LDPE-AM（A和M共混物浸泡的LDPE）在5、7、10 kV/mm时对电荷积累有拮抗作用，在3 kV/mm时表现出从协同作用到拮抗作用的趋势。对于LDPE-ACM（LDPE浸泡在A、C和M的混合物中），在3、5和7 kV/mm时协同作用占主导地位，而在10 kV/mm时拮抗作用明显。根据各个副产物的电荷分布结果，空间电荷积累的不同规则可能是由于不同电场下的电荷注入不同所致。