EVA/CR TPV的压缩应力松弛及其可逆回复行为  

Compression Stress Relaxation and Its Reversibility of Ethylene-vinyl Acetate Copolymer/Chloroprene Rubber Thermoplastic Vulcanizate

作　　者：褚建强 陆逊 朱大志 王兆波[1] CHU Jianqiang;LU Xun;ZHU Dazhi;WANG Zhaobo(Qingdao University of Science&Technology,College of Materials Science&Engineering,Qingdao 266042,China;Hisense Information Industry Park,Qingdao 266042,China)

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042 [2]青岛海信信息产业园,山东青岛266510

出　　处：《特种橡胶制品》2024年第5期1-5,共5页Special Purpose Rubber Products

基　　金：山东省自然科学基金项目资助(ZR2021ME028)。

摘　　要：采用动态硫化法制备了基于乙烯-醋酸乙烯酯共聚物(EVA)/氯丁橡胶(CR)的热塑性硫化胶(TPV),并对其力学行为、微观结构、压缩应力松弛、可逆回复行为以及EVA/CR质量比对可逆回复不同阶段应力松弛行为的影响进行了研究。结果表明:EVA/CR TPV的压缩应力松弛行为主要受EVA相影响,CR分散相对压缩应力松弛行为的影响较小;提高热处理温度或延长热处理时间,均可显著提高TPV压缩应力松弛可逆回复程度,且当温度在EVA熔点附近时,TPV应力松弛的可逆回复程度接近100%。Thermoplastic vulcanizate(TPV)based on ethylene-vinyl acetate copolymer(EVA)/chloroprene rubber(CR)blend was prepared by dynamic vulcanization.The mechanical properties,microstructure,the stress relaxation behavior under compression mode and its reversibility were investigated systematically.The model construction of reversibility of TPV were carried out by data fitting and the influences of blending ratio on the relaxation behavior were discussed.The results showed that the stress relaxation of the EVA/CR TPV was mainly determined by the EVA phase,while the dispersed phase of CR only had a minor influence on the compressive stress relaxation behavior.Increasing the heat-treatment temperature or prolonging the heat treatment duration could also enhance the degree of reversible recovery behavior of the compressive stress relaxation,and the reversible-recovery degree of EVA/CR TPV was close to 100%when heat-treatment temperature approached EVA melting point.

关 键 词：乙烯-醋酸乙烯酯共聚物 氯丁橡胶 热塑性硫化胶 压缩应力松弛 可逆回复 

分 类 号：TQ333.5[化学工程—橡胶工业] TQ334