动态硫化法制备三元乙丙橡胶/聚酰胺热塑性弹性体  

Preparation of ethylene propylene diene monomer/polyamide thermoplastic elastomer by dynamic vulcanization

作　　者：谢志赟[1] 郜奇[1] 刘欣[1] 黄华[1] 张隐西[1] 

机构地区：[1]上海交通大学化学化工学院,上海200240

出　　处：《合成橡胶工业》2004年第2期82-86,共5页China Synthetic Rubber Industry

摘　　要：采用动态硫化技术制备了三元乙丙橡胶(EPDM)/聚酰胺(PA)热塑性弹性体,研究了增容剂种类及用量、硫化体系及其用量、加料顺序、PA用量对其性能的影响,用扫描电镜分析了其相态结构。结果表明,用13份(质量份,下同)的氯化聚乙烯作为增容剂时,对该共混体系的增容效果最好;硫黄硫化体系是EPDM/PA热塑性弹性体的最佳硫化剂,当硫黄用量为2份时,既保证了该热塑性弹性体中的橡胶相能充分交联,又可避免过硫化对产品性能造成的负面影响;PA用量为35份的EPDM/PA热塑性弹性体具有良好的力学性能、耐溶剂性能和耐热老化性能;EPDM以平均粒径为2～5μm的粒子形态均匀分布于PA连续相中。The ethylene propylene diene monomer(EPDM)/polyamide(PA) thermoplastic elastomer was prepared by dynamic vulcanization.The effects of the compatibilizers,curing systems,orders of adding materials and PA content on the mechanical properties of EPDM/PA thermoplastic elastomer were investigated.The phase structure of EPDM/PA thermoplastic elastomer was studied by scanning electron microscope.The results showed that the best compatibilization was obtained by adding 13 phr chlorinated polyethylene compatibilizer.The best curing agents of EPDM/PA thermoplastic elastomer was sulfur systems.Adding 2 phr sulfer could not only ensure the full vulcanization of rubber phase,but also avoid the negative effects of over vulcanization on the properties of products.The EPDM/PA thermoplastic elastomer with PA 35 phr had good mechanical properties,resistance to solvent and thermal ageing properties.The EPDM particles distributed at an average size of 2～5 μm in the PA continuous phase.

关 键 词：三元乙丙橡胶 聚酰胺 动态硫化 热塑性弹性体 增容 相态结构 

分 类 号：TQ334[化学工程—橡胶工业]