常用耐油橡胶性能及密封性研究

Study on properties and leakproofness of commonly used oil resistant rubber

研究了常用耐油橡胶的硫化特性、力学性能、耐老化性能、耐油性能和密封性,包括丁腈橡胶(NBR)、氢化丁腈橡胶(HNBR)、丙烯酸酯橡胶(ACM)、氯丁橡胶(CR)和氟橡胶(FKM)。结果表明,与HNBR、ACM、CR和FKM相比,NBR具有流动性好、焦烧安全性好、硫化速度快等优良的工艺特性。综合来看,CR和HNBR的力学性能最好,NBR次之,而ACM和FKM力学性能最差;HNBR、ACM和FKM耐老化性能最好,CR次之,而NBR的耐老化性能最差;耐油性能从好到坏的排列顺序为:FKM>NBR4975>ACM>HNBR>NBR3365>CR;对于旋转轴唇型密封圈使用寿命,FKM>ACM>HNBR>NBR3365>NBR4975>CR。

The vulcanization characteristics,mechanical properties,aging resistance,oil resistance and sealing properties of commonly used oil resistant rubbers were studied,including nitrile rubber(NBR),hydrogenated nitrile rubber(HNBR),acrylate rubber(ACM),neoprene(CR)and fluororubber(FKM).The results showed that compared with HNBR,ACM,CR and FKM,NBR has excellent process characteristics such as good fluidity,good scorch safety and fast vulcanization speed.On the whole,CR and HNBR have the best mechanical properties,followed by NBR,while ACM and FKM have the worst mechanical properties;HNBR,ACM and FKM have the best aging resistance,CR is the second,and NBR has the worst aging resistance;The order of oil resistance from good to bad is:FKM>NBR4975>ACM>HNBR>NBR3365>CR;the order of service life of rotary shaft lip seals is:FKM>ACM>HNBR>NBR3365>NBR4975>CR.