辐照交联PVC/EVA共混物的形态结构与性能  

Morphology and Properties of Irradiation Cross-Linked PVC/EVA Blend

作　　者：李恩军[1] 章长明[1] 潘祥江[1] 王仕峰[2] 张勇[2] 

机构地区：[1]上海氯碱化工股份有限公司技术中心,上海200241 [2]上海交通大学高分子材料研究所,上海200240

出　　处：《中国塑料》2003年第2期28-32,共5页China Plastics

摘　　要：以电子束为辐照源 ,以三羟甲基丙烷三丙烯酸酯 (TMPTA)单体为交联敏化剂 ,对聚氯乙烯与乙烯 -醋酸乙烯共聚物 (EVA)的共混物进行辐照交联。采用红外吸收光谱、扫描电镜方法分析了添加改性EVA的共混物形态结构。通过凝胶含量、力学性能的测定 ,得到结论 :EVA共聚物与PVC共混可以促进PVC辐照交联 ,改性EVA促进效果更明显 ;辐照剂量增大、体系凝胶含量增加 ,力学性能及热延伸性能提高 ,但辐射剂量高于 5Mrad之后 。PVC/EVA blend was cross-linked by electron beam(EB)irradiation with trimethylolpropane triacrylate(TMPTA)monomer as cross-linking sensitizer.Morphology of PVC/EVA blend was studied by infrared spectroscopy and scanning electron microscope.The gel content and physical property were measured.In compounds with EVA copolymer,the cross-linking effectiveness of irradiation is raised.With modified EVA,the effectiveness is much better.The gel contents and hot prolongation increase with radiation dose and EVA contents.The physical property of PVC/EVA blend is enhanced by EB irradiation greatly,but the degradation of the blend increases with over 5 Mrad dose.

关 键 词：辐照交联 PVC/EVA共混物 形态结构 性能 聚氯乙烯 乙烯-醋酸乙类共聚物 电子束 

分 类 号：TQ316.6[化学工程—高聚物工业]