HDPE/EVA二元共混物敏化辐射交联与性能  

Sensitized Irradiation Cross-Linking and Properties of HDPE/EVA Blends

作　　者：严长浩[1] 王欢[1] 吴翰 张明[1,3] 

机构地区：[1]扬州大学化学化工学院,江苏扬州225002 [2]金坛沃德丰电子科技有限公司,江苏常州213251 [3]扬州大学测试中心,江苏扬州225002

出　　处：《塑料》2017年第1期46-50,共5页Plastics

基　　金：江苏省研究生工作站项目资助(13205003)

摘　　要：以三烯丙基异氰脲酸酯(TAIC)为交联敏化剂,采用电子束对高密度聚乙烯(HDPE)与乙烯-乙酸乙烯酯共聚物(EVA)的共混物进行辐射交联。研究了TAIC的敏化作用机理以及辐照剂量对共混物的力学性能、电学性能以及结晶度与交联度之间的相互关系。结果表明:TAIC对共混体系的交联反应具有敏化作用,可显著减小辐射剂量,共混物产生交联反应后可获得较高的凝胶含量;在辐射剂量120 kGy时,1%的TAIC即可使复合材料的拉伸强度提高了20%,断裂伸长率达到475.4%。此外,电子束辐射并未改变复合材料的晶型,随着辐射剂量的增加,复合材料的结晶温度、熔点、介电常数下降,共混物的介电损耗在120 kGy剂量下达到最佳。Triallyl isocyanurate （TAIC） was used as cross-linking sensitizer. High density polyethylene （HDPE） and ethylene-vinyl acetate copolymer （EVA） blend was radiation cross-linked by electron beam. The relationship between mechanical properties of the blend,degree of crystallinity and electrical properties as well as the degree of cross-linking under different radiation dose and TAIC content were studied. The results showed that TAIC added significantly reduce radiation dose and higher gel content was got;TAIC added at 1%, and radiation dose 120 kGy,the tensile strength of the composite was increased by 20% , elongation at break reached 475.4%. Further more,the electron beam radiation did not alter the crystalline form of the composite material with increasing radiation dose, the crystallization temperature of the composite material, the melting point, the dielectric constant was decreased, thermal stability was improved slightly after irradiation cross-linking, optimal dielectric loss dose was achieved at 120 kGy.

关 键 词：高密度聚乙烯 乙烯-乙酸乙烯酯共聚物 敏化辐射交联 凝胶含量 性能 

分 类 号：TQ317[化学工程—高聚物工业] TQ325.5