纳米SiO_2对XLPE/SEBS共混体系的水树抑制  

Effect of Nano-SiO_2 on Water Tree Retardance of XLPE/SEBS Blends

作　　者：杨君胜[1] 黄兴溢[1] 江平开[1] 汪根林[1] 刘飞[1] 

机构地区：[1]上海交通大学高分子科学与工程系上海市电气绝缘与热老化重点实验室,上海200240

出　　处：《电线电缆》2010年第5期28-32,共5页Wire & Cable

基　　金：国家自然科学基金项目资助[50677037]

摘　　要：将苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物(SEBS)以及纳米二氧化硅(SiO2)与低密度聚乙烯(LDPE)进行熔融共混,经过热压成型后制得了XLPE/SEBS/SiO2交联聚乙烯(XLPE)共混物,研究纳米SiO2含量对XLPE/SEBS的抗水树性能的影响,结果发现纳米SiO2具有良好的抗水树效果,共混物XLPE/SEBS/SiO2的水树长度随着纳米SiO2含量的增加而减小,共混物在纳米SiO2的含量为20 phr时水树的长度最短。另外还表征了XLPE/SEBS/SiO2共混物的形态、结晶度、力学性能以及介电性能,结果显示XLPE/SEBS/SiO2共混物具有良好的机械性能与绝缘性能。Samples of crosslinked low density polyethylene（XLPE） containing poly [styrene-b-（ethylene-CO-butyl-ene）-b-styrene]（SEBS） and nano-SiO2 were prepared by melt compounding and subsequent compression molding.The content of nano-SiO2 on the tree retardance of the XLPE/SEBS blends was investigated.The results showed that nano-SiO2 had good tree retardance.The tree length in XLPE/SEBS/SiO2 blends decreases with the increase in the nano-SiO2 content.The tree length becomes the shortest when the nano-SiO2 content reaches 20 phr.Furthermore,the morphology,crystallinity,mechanical properties and dielectric properties of the XLPE/SEBS/SiO2 blends were characterized.The result showed that the XLPE/SEBS/SiO2 blends have excellent mechanical properties and dielec-tric properties.

关 键 词：交联聚乙烯 苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物 纳米二氧化硅 水树 电性能 

分 类 号：TM215.13[一般工业技术—材料科学与工程]