低密度聚乙烯与有机硅共混和接枝改性对性能的影响研究  

Study on modification of low density polyethylene with siloxane

作　　者：李巧娟[1] 谢大荣[2] 

机构地区：[1]山西大学工程学院,山西太原030013 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《绝缘材料》2004年第4期17-19,共3页Insulating Materials

摘　　要：为了改善低密度聚乙烯(LDPE)电缆料的性能,采用聚硅氧烷与LDPE物理共混及化学接枝两种方法对其进行改性。用红外光谱证明了接枝反应的存在,用电子扫描显微镜分析了共混与接枝后LDPE环境应力开裂的断面形态。研究结果表明:除示性电压、流动性外,化学接枝聚硅氧烷后的LDPE在耐环境应力开裂性、断裂强度、伸长率、击穿场强等方面均比与聚硅氧烷物理共混后的聚乙稀好。Siloxane was blent with low density polyethylene(LDPE)and grafted on LDPE to imˉprove the properties of LDPE.The result of infrared spectroscopy shows that graft polymerˉization takes place between LDPE and siloxane.And scanning electron micoscope was employed to analyse the fracture surface of environmental stress cracking of blent LDPE and grafted LDPE.Result of study shows that environmental stress cracking,tensile strength,elongation at break,and breakdown voltage of grafted LDPE are better than that of blent LDPE except incepˉtion voltage of electric treeing and fluidity.

关 键 词：低密度聚乙烯 LDPE 聚硅氧烷 接枝 共混 

分 类 号：TM215.1[一般工业技术—材料科学与工程] TQ325.12[电气工程—电工理论与新技术]