氟橡胶/三元乙丙橡胶并用胶的性能

钱丽丽　 黄承亚　 胡钊　 邓纯　

摘　要：研究了不同并用比(质量比)时氟橡胶(FKM)/三元乙丙橡胶(EPDM)并用胶动态硫化和静态硫化后的低温性能、物理机械性能、耐老化性能和热稳定性,并用扫描电子显微镜表征了并用胶.结果表明,当并用比为30/70时,并用胶有较好的相容性;EPDM可以改善FKM的低温性能;随着EPDM用量的增加,并用胶的拉伸强度及邵尔A硬度降低;动态硫化FKM/EPDM并用胶比静态硫化FKM/EPDM并用胶具有更好的耐老化性能,但老化前前者的拉伸强度稍低于后者;FKM/EPDM并用胶的热稳定性优于纯EPDM;静态硫化FKM/EPDM并用胶中片层现象严重,动态硫化FKM/EPDM并用胶的EPDM包覆在FKM中,但相畴偏大.
关键词：氟橡胶;三元乙丙橡胶;并用;硫化;低温性能;物理机械性能;耐老化性能;热稳定性
分类号：TQ333.93 　文献标识码：B
文章编号：1000-1255(2009)03-0245-04

Properties of fluoroelastomer/ethylene-propylene-diene rubber blends

Qian Lili（College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China）　 Huang Chengya（College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China）　 Hu Zhao（College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China）　 Deng Chun （College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China）　

Abstract：Fluoroelastomer (FKM)/ethylene-propylene-diene rubber (EPDM) blends were prepared by static vulcanization and dynamic vulcanization.The low temperature performance,mechanical properties,aging resistance and thermal stability of FKM/ EPDM blends with different mass ratio of components were studied.The FKM/EPDM blends were characterized by scanning electron microscope.The results showed that FKM/EPDM blends had better compatibility when the mass ratio of components was 30/70.The low temperature performance of FKM could be improved by EPDM.The tensile strength and Shore A hardness decreased with EPDM amount increasing.The aging resistance of FKM/EPDM dynamic vulcanizates was superior to that of FKM/ EPDM static vulcanizates,but the tensile strength of the former was lower than that of the latter.The thermal stability of FKM/EPDM blends was better than that of pure EPDM.The lamellae in the FKM/ EPDM static vulcanizates were more.EPDM phase in FKM/EPDM dynamic vulcanizates was encapsulated in FKM,but the domain was big.
Keywords：fluoroelastomer;ethylene-propylene-diene rubber;blend;vulcanization;low temperature performance;mechanical property;aging resistance;thermal stability