Di Linting, Qin Chenyuan, Wang Wenying, Huang Anping, Wei Fuqing, Xu Huifang, Yang Shiyuan
Lanzhou Petrochemical Research Center, Petrochemical Research Institute, PetroChina, Lanzhou 730060, China.
Polymers (Basel). 2024 Mar 1;16(5):676. doi: 10.3390/polym16050676.
To investigate the influence of the crosslinked polyethylene (XLPE) structure on electrical performance, various analytical methods were employed to study polyethylene structures with different degrees of crosslinking. Dynamic rheological analysis was conducted to determine material shear viscosity, dynamic viscosity, storage modulus (G'), loss modulus (G″), and other rheological parameters. Additionally, the electrical performance of the material was analyzed by studying the phenomenon of space charge accumulation under direct current voltage. The results indicate that with an increasing mass fraction of the crosslinking agent, the crosslink density of crosslinked polyethylene initially increases and then decreases. When the dicumyl peroxide (DCP) content exceeds 1.0 wt.%, there is an accumulation of like-polarity space charges. The best rheological processing performance of crosslinked polyethylene is observed when the DCP content is in the range of 1.0-1.5 wt.%.
为研究交联聚乙烯（XLPE）结构对电性能的影响，采用了各种分析方法来研究不同交联度的聚乙烯结构。进行动态流变分析以确定材料的剪切粘度、动态粘度、储能模量（G'）、损耗模量（G″）及其他流变参数。此外，通过研究直流电压下的空间电荷积聚现象来分析材料的电性能。结果表明，随着交联剂质量分数的增加，交联聚乙烯的交联密度先增大后减小。当过氧化物二异丙苯（DCP）含量超过1.0 wt.%时，会出现同极性空间电荷的积聚。当DCP含量在1.0 - 1.5 wt.%范围内时，交联聚乙烯表现出最佳的流变加工性能。
