Structure and dynamic mechanical properties of hindered phenol AO-60 /nitrile-butadiene rubber composites
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摘要: 在丁腈橡胶（NBR）中添加受阻酚AO-60制备受阻酚/丁腈橡胶复合材料。利用DSC、 SEM、 动态力学分析仪(DMA)等测试手段对该复合材料的结构进行了表征, 并研究了其动态力学性能。结果表明： AO-60在不同的NBR基体中的分散情况不同。在丙烯腈质量分数为35%的NBR基体（N230S）中, AO-60形成了精细的分散结构, 且与NBR大分子之间形成了强烈的分子间作用力, 两相相容性好。与纯NBR基体相比, AO-60/NBR复合材料的玻璃化转变温度(Tg)随着AO---60含量的增加逐渐升高, 损耗因子（tanδ）逐渐增大, 阻尼性能提高。同时, AO-60/N230S复合材料表现出更好的阻尼性能。Abstract: A hindered phenol/nitrile---butadiene rubber (NBR) composite was successfully prepared by mixing tetrakis (methylene-3-(3-5-ditert-butyl-4-hydroxy phenyl) propionyloxy) methane (AO-60) into NBR．The microstructure of the AO-60/NBR composite was characterized by DSC, SEM and DMA, and its dynamic mechanical properties were studied. The results show that the dispersion of AO-60 is different in the various NBR matrix. Hindered phenol AO-60 forms a fine dispersion in the matrix of the NBR with the acrylonitrile mass fraction of 35% (N230S). A strong intermolecular interaction is formed between the AO---60 and NBR. Compared with the neat NBR matrix, the value of Tg and tanδ for the composites increases gradually with increasing the AO-60 amount. Moreover, AO-60/N230S composites have a high performance as a damping material.
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Key words:
- NBR /
- hindered phenol /
- hydrogen bonding /
- dynamic mechanical properties /
- damping properties
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