Blending Modification And Performance Optimization Of The Rubber Including Acrylonitrile Group

In this article, the blending modification of the rubber including acrylonitrile group such as HNBR and NBR with the saturation structure rubber were investigated. The effects of blend ratio to the properties of HNBR/AEM, NBR/AEM, NBR/HNBR and NBR/CM blends were studied. The effects of reinforcing agent blend to the HNBR/AEM blends were also studied. Summing up all the outstanding characteristics of two kinds of rubber obtained material with excellent low temperature, high temperature resistance, oil resistance and mechanical properties.The results showed that:HNBR and AEM had good compatibility. Blending with AEM could significantly improve the hot air aging resistance and low temperature property of HNBR. With the increase of AEM content, the vulcanization rate, mechanical properties and oil resistance of HNBR/AEM blends were reduced; the processing performance and hot air aging resistance were improved. Adding methyl acrylate in CB/Silica could improve the mechanical properties and hot air aging resistance of HNBR/AEM; the mechanical properties of HNBR/AEM with MgMA were better than ZDMA.HNBR had better mechanical properties, hot air aging resistance and ozone resistance than NBR. NBR and HNBR had good compatibility, blending with HNBR could significantly improve the mechanical properties, hot air aging resistance and ozone aging resistance of NBR. With the increase of HNBR content, the tensile strength, tear strength, elongation at break gradually increased, the change rate of propeties after hot air aging gradually reduced, the retention rate of properties after ozone aging gradually increased.Blending AEM could improve the processability and hot air aging resistance of NBR. With the increase of AEM content, the mechanical properties of NBR/AEM blends reduced. NBR and HNBR/AEM (50/50) had excellent compatibility. With the increase of HNBR/AEM (50/50) content, the hot air aging resistance and ozone resistance of NBR/HNBR/AEM improved.The compatibility of NBR and CM was excellent; blending with CM could obviously improve the hot air aging resistance and ozone aging resistance of NBR. With the increase of CM content, the tensile strength decreased, tear strength and elongation at break increased, the change rate of properties after aging gradually reduced, the retention rate of properties after ozone aging increased. DMA analysis shows that blending CM could decrease the low temperature performance of NBR. TGA analysis showed that NBR/CM (60/40) of the main chain degradation temperature was lower than NBR, but mass loss ratio was less, so the high temperature resistant performance of NBR was also good.