PVC/NBR/BR三元共混弹性体的制备与研究

PREPARATION AND STUDY OF TERNARY BLENDING ELASTMER OF PVC/NBR/BR

本文重点叙述了聚氯乙烯(PVC)、丁腈橡胶(NBR)、顺丁橡胶(BR)三元共混弹性体的制备与研究,通过添加顺丁胶后,三元共混体的冲击回弹性、耐磨性及耐寒性均比二元PVC/NBR共混物得以改善,但拉仲强度、断裂伸长率及耐油性降低。获得最佳综合性能的共混比为PVC:NBR:BR=30:60:10(重量比)。实验表明,PVC/NBR/BR三元共混弹性体是复相体系,有较好的相容性。

This paper was focussed on the method for the manufacture and study of the elastomer blended with polyvinyl chloride (PVC), acrylonitrile-butadiene rubber(NBR) and butadiene rubber (BR). The morphology and compatibility of the ternary blends of PVC/NBR/BR were studied by electron microscope and dynamic mechannical analysis. The effects of PVC/NBR/BR blending ratios, fillers, different knids of curing agents and blending technology on the properties of ternary blending elastomer were discussed comprehensively. The experiment results showed that ternary blends of PVC/NBR/BR were multiphase systems and had better compatibility. The properties of impact resilience, wear resistance and cold resistance of PVC/NBR blends were improved by adding BR to it, but tensile strength, elongation at break and oil resistance were lowered. Ternary blending elastomer has exhibited optimum properties with the blending ratio of PVC:NBR:BR=30:60:10(mass ratio).