Hydrogenated butadiene-acrylonitrile rubber(HNBR) reinforced by zinc acrylate (ZDA) in-situ formed from zinc oxide (ZnO) and acrylic acid (AA).The influence of ZDA on the structure of HNBR was analyzed by FT-IR and SEM.The effects of the molar ratio of ZnO/AA,the theoretical amount of ZDA in-situ formation and the amount of DCP on the modification of HNBR were studied systematically.The results showed that in-situ ZDA reacted ionic covalent bonding in the process of high temperature vulcanization,which was initiated by DCP.The shore A hardness and 100% constant elongation stress of HNBR increased with the increase of ZnO/AA molar ratio,ZDA theoretical in-situ production and DCP content,and the elongation at break decreased constantly,while the tensile strength showed a trend of first increasing,peak value and then decreasing.
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