高压电缆用交联聚乙烯抗焦烧与绝缘特性研究  

Study on Scorch Resistance and Insulating Properties of Cross-linked Polyethylene for High Voltage Cables

作　　者：闫轰达 李文鹏 李维康 史晓宁 李红雷 张翀 YAN Hongda;LI Wenpeng;LI Weikang;SHI Xiaoning;LI Honglei;ZHANG Chong(Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102211,China;State Grid Shanghai Municipal Electric Power Company,Shanghai 200122,China)

机构地区：[1]全球能源互联网研究院有限公司,北京102211 [2]国网上海市电力公司,上海200122

出　　处：《绝缘材料》2022年第8期22-27,共6页Insulating Materials

基　　金：国家电网公司总部科技项目(5500-201958131A-0-0-00)。

摘　　要：为实现绝缘料的长时间稳定挤出,通过熔融共混的方法制备了不同抗氧剂含量的交联聚乙烯,研究了不同含量的抗氧剂对交联聚乙烯抗焦烧性能的影响,同时对交联聚乙烯的力学性能、电气强度、介电特性和热性能进行了综合评估。结果表明:随着抗氧剂含量的增加,交联聚乙烯的扭矩逐渐降低,同时交联聚乙烯发生交联的时间缓慢增加,材料的抗焦烧特性得到提升。另外,物料的温度略有降低,保证了材料长时间挤出的稳定性。交联聚乙烯的电导率随着抗氧剂含量增加变化不明显,交流电气强度和介质损耗略有提升,交流电气强度提升了4.5%,介质损耗因数均小于5.0×10^(-4),熔融和结晶特性变化不明显。In order to achieve long-term stable extrusion of insulating materials,a cross-linked polyethylene with different antioxidant content was prepared by melt blending,and the effect of different antioxidant content on the scorch resistance of cross-linked polyethylene was studied.At the same time,the mechanical properties,electric strength,dielectric properties,and thermal properties of cross-linked polyethylene were comprehensively evaluated.The results show that with the increase of antioxidant content,the torque of cross-linked polyethylene decreases gradually,the cross-link time increases slowly,and the scorch resistance of the material is improved.In addition,the temperature of cross-linked polyethylene material is reduced slightly,which ensures the stability of long-term extrusion for material.The conductivity of cross-linked polyethylene does not change significantly with the increase of antioxidant content,while the AC electric strength and dielectric loss increase slightly.The AC electric strength increases by 4.5%,the dielectric loss factor is less than 5.0×10^(-4),and the melting and crystallization characteristics do not change significantly.

关 键 词：抗焦烧 扭矩 交流电气强度 介电性能 热性能 

分 类 号：TM215[一般工业技术—材料科学与工程]