双向可逆形状记忆乙烯-醋酸乙烯酯共聚物的制备和性能研究  

Preparation and properties of bidirectional reversible shape memory ethylene vinyl acetate copolymer

作　　者：张瑞[1] 姚佳斌 李轩 何雪莲[2] ZHANG RUI;YAO Jiabin;LI Xuan;HE Xuelian(Daqing Petrochemical Research Center of PetroChina,Daqing 163714,China;Shanghai Key Laboratory of Multiphase Material Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]中国石油天然气股份有限公司大庆石油研究中心,辽宁大庆163714 [2]华东理工大学,上海市多相结构材料化学工程重点实验室,上海200237

出　　处：《中国塑料》2022年第12期6-15,共10页China Plastics

摘　　要：以乙烯-醋酸乙烯酯共聚物(EVA)为原料,过氧化2-乙基己基叔丁酯(TBPE)为交联剂,合成了交联EVA双向形状记忆聚合物(SMP),并且考察了TBPE含量对于交联EVA性能的影响。结果表明,交联EVA的T_(m)和T_(c)随着TB-PE含量的上升呈现下降的趋势,可以通过交联剂比例调节材料的驱动温度;交联EVA的形状固定率会随着TBPE含量的增加呈现下降趋势,最低达到88.83%,而样品的形状恢复率均超过99%,并且都具有单向和双向形状记忆功能;交联EVA也具有双向记忆性能,R_(a,2W)随着TBEC的含量增大而减小,R_(r,2W)则相反;因此,通过改变交联剂EVA的量,对于双向交联EVA的性能有较大影响。A type of cross⁃linked ethylene⁃vinyl acetate copolymer(EVA)⁃based bidirectional shape memory polymer(SMP)was prepared using EVA as a raw material and tert⁃butyl peroxy⁃2⁃ethylhexanoate(TBPE)as a cross⁃linking agent,and the effect of TBPE content on the performance of the resultant products was investigated.The results indicat⁃ed that the T_(m) and T_(c) of the EVA⁃based SMPs decreased with an increase in the content of TBPE,and their driving tem⁃perature could be adjusted by the content of the cross⁃linking agent.The EVA⁃based SMPs obtained both one⁃way and two⁃way shape memory functions.The shape fixation rate presented a downward trend with an increase in the content of TBPE,reaching the lowest value of 88.83%and a shape recovery rate of over 99%.The EVA⁃based SMPs also ex⁃hibited two⁃way memory performance,and their R_(a,2W) decreases with an increase in the content of TBPE content,but their R_(r,2W) presented an opposite trend.The content of cross⁃linking agent showed a great influence on the performance of the EVA⁃based SMPs.

关 键 词：交联乙烯-醋酸乙烯酯共聚物 过氧化2-乙基己基叔丁酯 形状记忆聚合物 双向记忆功能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]