改善三元乙丙橡胶耐油性能的研究

Research of oil resistant performance for EPDM

研究氯化聚乙烯(CPE)、丁腈橡胶(NBR)与三元乙丙橡胶(EPDM)并用对共混胶力学性能和耐油性能的影响。结果表明,在EPDM/CPE共混胶中随CPE用量的增加,硫化胶的硬度、拉伸强度、撕裂强度和定伸应力呈现上升趋势、在ASTM3号油中浸泡后体积变化率变化不明显;在EPDM/NBR共混胶中随NBR用量的增加,硫化胶的拉伸强度、撕裂强度和定伸应力呈现下降趋势、在油中体积变化率明显减小;在EPDM/NBR/CPE共混胶中随NBR和CPE用量的增加,硫化胶的力学性能变化不明显,但在油中浸泡体积变化率明显降低,通过电镜照片对共混胶断面分析得知CPE的加入明显改善了EPDM和NBR之间的相容性。

The effect of CPE,NBR and EPDM blending on mechanical properties and oil resistant performance for rubber mixture.The results show that, with the increase of CPE, EPDM/CPE blend, the vulcanizates of hardness, tensile strength, tear strength and stretch stress rised, volume change rate is not obvious after soaking in ASTM3; In rubber EPDM/NBR/CPE blend, with the increase of NBR and CPE, the mechanical properties of the vulcanizates change is not obvious, but change rate signifi cantly lower in oil soak, through the analysis of blending adhesive section by electron micrograph that the addition of CPE improved the compatibility between the EPDM and NBR.