羧基丁腈橡胶的硫化性能

用无硫硫化体系、低硫高促进剂硫化体系、普通硫黄硫化体系、过氧化物硫化体系、金属氧化物硫化体系和硫黄／金属氧化物硫化体系对羧基丁腈橡胶（XNBR）进行了硫化，研究了XNBR的硫化性能、物理机械性能、耐老化性能、压缩永久变形和耐油性能。结果表明，采用普通硫黄硫化体系、硫黄／金属氧化物硫化体系所得到的XNBR硫化胶的综合物理机械性能较好；用无硫硫化体系、低硫高促进剂硫化体系和硫黄／金属氧化物硫化体系所得到的XNBR硫化胶的耐老化性能较好；用硫黄／金属氧化物硫化体系所得到的XNBR硫化胶的耐磨性、压缩永久变形较好；用普通硫黄硫化体系和硫黄／金属氧化物硫化体系所得到的XNBR硫化胶的耐油性能较好。

Vulcanization properties of carboxylated nitrile rubber

Carboxylated nitrile rubber (XNBR) were vulcanizated with sulphur-free vulcanization system,low-sulphur high-accelerant vulcanization system, general sulphur vulcanization system,peroxide vulcanization system,metal oxide vulcanization system and sulphur/metal oxide vulcanization system.The vulcanization properties,mechanical properties,aging resistance, compression set and oil resistance of XNBR were investigated.The results showed that the XNBR vulcanizated with general sulphur vulcanization system and sulphur/metal oxide vulcanization system had better comprehensive mechanical properties.The XNBR vulcanizated with sulphur-free vulcanization system, low-sulphur high-accelerant vulcanization system and sulphur/metal oxide vulcanization system had better aging resistance.The XNBR vulcanizated with sulphur/metal oxide vulcanization system had better abrasive resistance and compression set.The XNBR vulcanizated with general sulphur vulcanization system and sulphur/metal oxide vulcanization system had better oil resistance.