在丁腈橡胶(NBR)/聚氯乙烯(PVC)共混基体中添加了受阻酚AO-80,制备了AO-80/NBR/PVC交联复合材料,并研究了其微观结构和动态力学性能.扫描电镜、透射电镜的结果证明,大部分AO-80溶解在NBR/PVC基体中,少量的AO-80以亚微米尺寸的微粒分散于基体中;X射线衍射、差示扫描量热分析(DSC)结果证明,AO-80在基体中处于非晶态.DSC、动态热机械分析的结果表明,AO-80与基体之间形成了很强的分子间作用力,使材料的玻璃化温度大幅度上升.同时,AO-80/NBR/PVC交联复合材料的损耗因子tanδ-温度T曲线只有一个单峰,与纯的NBR/PVC交联橡胶相比,随着AO-80用量增加,tanδ峰明显向高温移动,并且峰值由0.96增加到1.56.AO-80/NBR/PVC交联复合材料呈现明显的拉伸取向,具备优异的力学强度,具有很好的实用价值.
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