马来酸酐接枝液体聚丁二烯对丁腈橡胶性能的影响

Influence of Maleic Anhydride Grafted Liquid Polybutadiene on the Properties of NBR

采用机械共混法制备丁腈橡胶(NBR)/马来酸酐接枝液体聚丁二烯(MA-LB)并用胶,研究MA-LB对NBR性能的影响。结果表明:随着MA-LB用量增大,胶料的焦烧性能改善,硫化时间延长;低丙烯腈含量NBR胶料硬度和拉断永久变形不变,拉断伸长率逐渐增大,拉伸强度先增大后减小(在MA-LB用量为10份时拉伸强度最大),耐低温性能大幅提高;高丙烯腈含量的NBR胶料硬度变化不大,拉伸强度减小,拉断伸长率和拉断永久变形逐渐增大。MA-LB用量为10份时胶料的高低温压缩回弹性能和耐油性能良好,综合性能较佳。

In this study, the blends of NBR/maleic anhydride-grafted liquid polybutadiene (MA-LB) were prepared by mechanical blending, and the inlfuence of the MA-LB on the properties of the blends was investigated. It was found that when the amount of MA-LB in the blends increased, the scorch property of the compound was improved and the curing time was extended. For the NBR with low acrylonitrile content, when MA-LB amount increased, the hardness and permanent tensile set of the vulcanizates changed little, the elongation at break increased, the tensile strength increased, but reached maximum value when MA-LB amount was 10 phr, and then decreased. For the NBR with high acrylonitrile content, when MA-LB amount increased, the hardness didn’t change, the tensile strength decreased, and the elongation at break and permanent tensile set increased gradually. The experimental results showed that when the MA-LB amount was 10 phr, high and low temperature compression resilience and the oil resistance of the blends were excellent, and overall performance was good.