复合硫化剂对氟橡胶/硅橡胶共混物结构和性能的影响

分别采用过氧化二异丙苯(DCP)/三烯丙基异氰脲酸酯(TAIC)、双酚AF/苄基三苯基氯化磷(BPP)/DCP、3#硫化剂/DCP三种复合硫化剂硫化氟橡胶/硅橡胶共混物。研究了不同复合硫化剂对氟橡胶/硅橡胶共混物的硫化特性、力学性能、耐热老化性能、耐油性能和低温性能的影响,采用动态热机械分析(DMA)、热重分析(TG)和扫描电镜(SEM)方法对氟橡胶/硅橡胶共混物进行表征。结果表明,采用DCP/TAIC硫化的氟橡胶/硅橡胶共混物具有良好的综合物理力学性能。DMA分析表明,DCP/TAIC硫化的共混物中氟橡胶相和硅橡胶相的Tg最高,TG分析表明,DCP/TAIC硫化的共混物具有良好的热稳定性。SEM照片表明,DCP/TAIC硫化的共混物界面结合作用较强。

Effect of Compound Curing Systems on Morphology and Properties of Fluororubber/Silicone Rubber Blends

The fluororubber(FKM) and silicone rubber(MVQ) blends were vulcanized with dicumyl peroxide(DCP)/triallyl isocyanurate(TAIC),bisphenol AF/benzyltriphenylchlorophosphine(BPP)/DCP and N,N′-dicinnamal-1,6-hexamethylenediamine(DIAK No.3)/DCP compound curing system,respectively.Effect of the compound curing systems on curing behavior,mechanical properties,heat ageing properties,oil resistance and low temperature properties of FKM/MVQ blends was studied.FKM/MVQ blends were characterized by DMA,TG and SEM analysis.The results show that FKM/MVQ blends vulcanized with DCP/TAIC curing system have better over-all physical properties than those vulcanized with bisphenol AF/BPP/DCP and DIAK No.3/DCP curing systems.DMA results indicate that Tg of FKM and MVQ matrix in the blends cured with DCP/TAIC is highest.DCP/TAIC-cured blends show better thermal stability than those vulcanized with the other curing systems by TG analysis.There are well adhered at the interface in DCP/TAIC-cured blends by SEM photos.