采用氧化锌(ZnO)与丙烯酸(AA)原位生成丙烯酸锌(ZDA)增强氢化丁腈橡胶(HNBR),通过傅里叶变换红外光谱仪、扫描电子显微镜分析了ZDA对HNBR结构的影响,并研究了ZnO与AA摩尔比、ZDA理论原位生成量和过氧化二异丙苯(DCP)用量对HNBR的增强效果。结果表明:在高温硫化过程中,原位生成ZDA在DCP引发下发生离子型共价键合对HNBR进行增强;HNBR的邵氏A硬度与100%定伸应力随ZnO与AA摩尔比、ZDA理论原位生成量和DCP用量的增加而增加,断裂伸长率持续降低;HNBR的拉伸强度呈现出先增加,出现峰值后再降低的趋势。
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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