EVA/EPDM/OBC共混物的结晶行为及其发泡材料的结构与性能  

Crystallization behavior of EVA/EPDM/OBC blends and structure and properties of their foamed materials

作　　者：邢恩晗 苏群峰 邹存英 万禹江 王元霞 宋立新 李先亮 XING Enhan;SU Qunfeng;ZOU Cunying;WAN Yujiang;WANG Yuanxia;SONG Lixin;LI Xianliang(College of Materials Science and Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China;Polymer High Functional Film Engineering Research Center of Liaoning Province,Shenyang 110142,China)

机构地区：[1]沈阳化工大学材料科学与工程学院,辽宁沈阳110142 [2]辽宁省高分子高功能薄膜工程研究中心,辽宁沈阳110142

出　　处：《合成树脂及塑料》2025年第2期66-71,共6页China Synthetic Resin and Plastics

基　　金：辽宁省教育厅青年科技人才“育苗”项目(LQ2019018)。

摘　　要：以乙烯-乙酸乙烯酯共聚物(EVA)、三元乙丙橡胶(EPDM)和烯烃嵌段共聚物(OBC)为原料,采用熔融共混法制备了EVA/EPDM/OBC共混物,并通过模压发泡法制备了EVA/EPDM/OBC复合发泡材料,研究了其结构与性能。结果表明:OBC用量为5%(w)时,OBC在EVA/EPDM中分散最均匀,其用量超过10%(w)后分散性变差;OBC用量为5%和10%(w)时,复合发泡材料的拉伸强度和断裂伸长率均较未加OBC时提高,硬度降低,压缩永久变形率变化不大,泡孔结构更优异,满足发泡材料的综合性能要求;但加入过量OBC会使复合发泡材料的压缩永久变形率增大。Ethylene-vinyl acetate(EVA)copolymer,ethylene propylene diene monomer(EPDM)rubber,and olefin block copolymer(OBC)were used as the raw materials to prepare EVA/EPDM/OBC blends via melt blending,which were used to prepare high-performance EVA/EPDM/OBC foamed materials by compression foaming method,whose structure and properties were investigated.The results show that when the mass fraction of OBC is 5%,OBC is dispersed most uniformly in EVA/EPDM,and its dispersion decreases when its mass fraction exceeds 10%.The tensile strength and elongation at break of the EVA/EPDM/OBC foamed materials are larger than those of EVA/EPDM foam materials when the mass fraction of OBC are 5%and 10%respectively,while the hardness of the foamed composite materials is reduced and compression permanent set changes insignificantly,whose excellent foam structure meets the comprehensive performance requirements of foamed materials.However,excessive OBC improves the compression permanent set of the foamed blends.

关 键 词：乙烯-乙酸乙烯酯共聚物 三元乙丙橡胶 烯烃嵌段共聚物 泡孔结构 结晶行为 力学性能 

分 类 号：TQ325[化学工程—合成树脂塑料工业] TB332.3[一般工业技术—材料科学与工程]