不同分子量分布的乙烯-醋酸乙烯酯共聚物对LDPE共混体系电性能的影响  

Effect of Ethylene-vinyl Acetate Copolymer with Different Molecular Weight Distribution on Electrical Properties of LDPE Blends

作　　者：康宇斌 夏兵[2] 翟近涛 查俊伟[3] KANG Yubin;XIA Bing;ZHAI Jintao;ZHA Junwei(State Grid Jiangsu Electric Power Co.,Ltd.Maintenance Branch Company,Nanjing 211102,China;Beijing Guodianfutong Science and Development Co.,Ltd.,Beijing 100070,China;University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]国网江苏省电力有限公司检修分公司,江苏南京211102 [2]北京国电富通科技发展有限责任公司,北京100070 [3]北京科技大学,北京100083

出　　处：《绝缘材料》2019年第10期35-40,共6页Insulating Materials

基　　金：国家自然科学基金资助项目(51622701);国家重点基础研究发展计划(973计划)项目(2014CB239501)

摘　　要：选取两种不同分子量及分子量分布的乙烯-醋酸乙烯酯共聚物(EVA),与低密度聚乙烯(LDPE)通过熔融共混法制备了LDPE/EVA共混物。通过结晶行为和陷阱特性研究了LDPE/EVA共混体系的空间电荷行为和直流击穿强度。结果表明:与纯LDPE相比,LDPE/EVA 28-25共混物有效地抑制了空间电荷的积累,并且直流击穿强度提高至314 kV/mm。LDPE/EVA blends were prepared using low-density polyethylene(LDPE) and two kinds of ethylene-vinyl acetate copolymer(EVA) with different molecular weight and molecular weight distribution by melting blending. The space charge behavior and direct current breakdown strength of the LDPE/EVA blends were investigated by crystallization behavior and trap characteristics. The results show that the LDPE/EVA 28-25 blends suppress the accumulation of space charge effectively compared with LDPE, and the DC breakdown strength increases to 314 kV/mm.

关 键 词：LDPE/EVA共混 结晶行为 陷阱特性 空间电荷 直流击穿强度 

分 类 号：TM215[一般工业技术—材料科学与工程]