PVC/EVA形状记忆管材的制备及性能研究  

Preparation and Properties of EVA/PVC Shape Memory Plastic Pipe

作　　者：武承林 何志才[2] 韦佳倩[2] 张建均 WU Cheng-lin;HE Zhi-cai;WEI Jia-qian;ZHANG Jian-jun(Yonggao Co.,Ltd.,Taizhou 318000,China;School of Pharmaceutical and Chemical Engineering,Taizhou University,Taizhou 318000,China)

机构地区：[1]永高股份有限公司,浙江台州318000 [2]台州学院医药化工学院,浙江台州318000

出　　处：《塑料工业》2018年第7期155-158,共4页China Plastics Industry

基　　金：浙江省重点研发计划(2015C01069);浙江省公益基金项目(No.2017C31112)

摘　　要：采用双螺杆挤出制备了聚氯乙烯/乙烯-醋酸乙烯共聚物(PVC/EVA)共混物管材,考察了EVA含量对PVC塑料管材的流变性能、热力学性能、形状记忆等性能的影响。研究发现,EVA弹性体能够显著增加材料的韧性和降低材料的维卡软化温度,缩短材料的塑化时间;制备的PVC/EVA共混物具有较佳的形状记忆效应,且形变回复后管材的环刚度、拉伸强度、断裂伸长率等力学性能没有明显降低,满足国标PVC管材要求。In this paper, polyvinyl chloride （PVC） /ethylene-vinyl acetate copolymer（EVA） blends were prepared by means of twin-screw extrusion on the basis of industrial PVC electrical casing materials. The effects of EVA content on the rheological properties, thermodynamic properties and shape memory of PVC plastic pipes were investigated. The results show that EVA elastomer can significantly increase the toughness of the material and reduce the Vicat softening temperature of the material and shorten the plasticizing time of the material. The prepared PVC/EVA blend has better shape memory effect, and the mechanical properties such as ring stiffness, tensile strength, and elongation at break are not significantly reduced, which meet the national standard requirements of PVC pipe.

关 键 词：聚氯乙烯 乙烯-醋酸乙烯共聚物 塑料管材 形状记忆 形变回复 

分 类 号：TQ325[化学工程—合成树脂塑料工业] TQ320.724