The enhanced physical properties of XLPE insulation for high voltage cable based on LDPE/LLDPE or LDPE/HDPE blends

被引：8

作者：

Qu, Jinfei ^{[1
]}

Wang, Shihang ^{[1
]}

Li, Shengtao ^{[1
]}

Liu, Hongjian ^{[1
]}

Wu, Yifan ^{[1
]}

Du, Luwei ^{[1
]}

Wang, Zejia ^{[1
]}

Guo, Lingqi ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, Xian, Peoples R China

来源：

POLYMER DEGRADATION AND STABILITY | 2023年 / 218卷

基金：

中国国家自然科学基金;

关键词：

XLPE; Cable insulation; Crosslinking properties; LLDPE; HDPE; CHAIN-BRANCHED POLYETHYLENES; CROSS-LINKED POLYETHYLENE; LOW-DENSITY POLYETHYLENE; SMALL-ANGLE NEUTRON; LINEAR LOW-DENSITY; MECHANICAL-PROPERTIES; MOLECULAR-STRUCTURE; NETWORK FORMATION; SOLID-STATE; MORPHOLOGY;

D O I：

10.1016/j.polymdegradstab.2023.110573

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Exploring methods of improving the performance of high-voltage cable XLPE insulation is a hot issue in highvoltage and insulation technology. This paper presented a new method to improve the physical properties of XLPE by doping low-content polyolefin materials, such as LLDPE or HDPE. The new XLPE insulation has significantly improved high-temperature mechanical properties and slightly improved room-temperature mechanical properties. The optimal thermal elongation properties were achieved with a 1 phr content of HDPE and LLDPE, while DC conductivity, DC breakdown strength, and dielectric properties were stable or slightly improved. The properties mentioned above showed a decreasing trend at higher content. This study demonstrated that adding HDPE or LLDPE to LDPE increases the physical entanglement of XLPE molecular chains, which has a similar effect to crosslinks formed by chemical crosslinking in enhancing the mechanical properties of XLPE insulation. This suggests that there is a potential to reduce the concentration of crosslinking agents during XLPE cable manufacturing while maintaining electrical properties and improving mechanical properties at elevated temperatures. It provides a new idea for improving the properties of XLPE insulation for high-voltage DC cables.

引用

页数：11

共 51 条

[1] STUDIES ON LDPE LLDPE BLENDS [J].