不同硫化体系对氟橡胶/氯醚橡胶共混物性能的影响

钱丽丽　 黄承亚　

摘　要：在固定氟橡胶(FKM)硫化体系(双酚AF)的条件下,研究了改变氯醚橡胶(CO)硫化体系对FKM/CO共混物硫化特性以及硫化胶的物理机械性能、耐老化性能、耐油性能及热稳定性的影响.结果表明,采用促进剂NA-22/MgO体系时,FKM/CO共混物具有较好的硫化特性,硫化胶的综合物理机械性能较好,但耐老化性能仍需改善;采用促进剂TCY/MgO/CaCO_3体系时需要较长的硫化时间,且焦烧性能较差;并用促进剂TMTD或促进剂DTDM后混炼胶的交联效果变差;FKM/CO共混物具有较好的热稳定性且热失重起始温度高于300 ℃.
关键词：氟橡胶;氯醚橡胶;硫化体系;共混物;硫化特性;物理机械性能
分类号：TQ333.93 　文献标识码：B
文章编号：1000-1255(2010)01-0053-03

Effect of curing systems on properties of fluorine rubber/epichlorohydrin rubber blends

Qian Lili（School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China）　 Huang Chengya（School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China）　

Abstract：With bisphenol AF as curing system of fluorine rubber(FKM), the effects of different curing systems of epichlorohydrin rubber(CO) on the cure characteristics of FKM/CO blends and mechanical properties, aging resistance, oil resistance and thermal stability of FKM/CO vulcanizates were investigated. The results showed that the FKM/CO blends with better cure characteristices and comprehensive mechanical properties were obtained when curing system NA-22/MgO system was used, but their aging resistance needed to be improved. The blends with TCY/MgO/CaCO_3 system had longer optimum cure time and shorter scorch time. The blends had poor curing characteristics when the curing system was used with TMTD or DTDM. The FKM/CO vulcanizates had good thermal stability, and their initial temperature of heating loss were above 300 ℃.
Keywords：fluorine rubber; epichlorohydrin rubber; curing system; blend; curing characteristics; mechanical property