【摘要】 在丁腈橡胶(NBR)中添加酚醛(PR)和受阻酚AO80,制备NBR/PR/AO80三元共混橡胶。采用DSC,FTIR和扫描电子显微SEM镜等方法表征了NBR/PR/AO80三元共混橡胶的结构,研究了其阻尼性能和力学性能。结果表明,AO80与丁腈橡胶和酚醛树脂有较好的相容性,动态力学性能温度谱中损耗角正切tanδ呈现单峰特征,并且随AO80含量增加,三元共混橡胶的阻尼峰值提高;硫化胶的拉伸强度呈现先增加后降低趋势。与NBR/PR硫化橡胶相比,添加AO80的三元共混橡胶保持了几乎相同的阻尼温域,但却具有更高的阻尼峰值。更多还原

【Abstract】 3,9-bis[1,1-dimethyl-2{β-(3-tertbutyl-4-hydroxy-5-methylphenyl)propionyloxy}ethyl]-2,4,8,10-tetraoxaspiro-undecane(AO80) and the phenolic resin(PR) were added into the acrylonitrile-butadiene rubber(NBR) to prepare the vulcanized NBR/PR/AO80 rubbers.The structures of vulcanized rubbers were characterized by DSC,FTIR and SEM.And their damping and mechanical properties were investigated in detail.The results showed good compatibility of AO80 in the blend system,which had a single peak in the temperature spectrum of dynamic mechanical properties.With the content increase of AO80,the damping peak of vulcanized rubber enhanced.However,the mechanical properties increased,and then decreased with the content increases of AO80.In contrast with NBR/PR rubbers,NBR/PR/AO80 rubbers possessed almost the same damping temperature ranges and higher damping peaks.Therefore,we believed that it would be a kind of respectively high-damping rubber.更多还原