Nitrile rubber(NBR)/ hindered phenol AO-60 composites were prepared,influence of AO-60 amount on the thermal property and microstructure of NBR/AO-60 composites was investigated,and the shape memory characteristics of NBR/AO-60 composites were investigated at different AO-60 amounts and deformations.The results showed that the glass transition temperature(Tg) increased with the increase of AO-60 amount,and the Tg of the composites rised to-1.2 ℃ when AO-60 amount was 100 phr.Both of the shape fixity rate and shape recovery rate of NBR/AO-60 composites were higher than 90% at whether high or low deformation,indicating that NBR/AO-60 composites had excellent shape memory characteristics,which had good repeatability.There was a large number of hydrogen bonds between NBR and AO-60 molecules in NBR/AO-60 composites,and the characteristic transition temperature of NBR/AO-60 composites could be adjusted by controlling the action and intensity of hydrogen bond network.

Crosslinked nitrile rubber (NBR) /hindered phenol (AO-80) /carbon black composites were prepared by mixing AO-80 and carbon black into NBR with different bound acrylonitrile contents. The thermal properties, dynamic mechanical properties and mechanical properties of the composites were characterized by differential scanning calorimetry, dynamic mechanical analysis and tensile tester. The results showed that compared with pure NBR, the glass transition temperature of NBR/AO-80/carbon black composites increased greatly, and shifted to high temperature direction with increasing the bound acrylonitrile content of NBR. NBR/AO-80/carbon black composites showed excellent damping properties: loss factor (tan δ) was more than 1.22, and the effective damping temperature range (tan δ equal to or more than 0.3) was more than 38℃, the frequency range with high tan δ was wide at different reference temperatures. NBR/AO-80/carbon black composites had good mechanical properties and thermal aging resistance. Especially, N 220 S/AO-80/carbon black composites were the best in all-round properties.

在丁腈橡胶（NBR）中添加受阻酚AO-80和不同用量的炭黑N 220,制备了NBR/AO-80/N220复合材料,研究了复合材料的热性能、动态力学性能、物理机械性能和热老化性能。结果表明,NBR/AO-80/N220复合材料的玻璃化转变温度与NBR/AO-80复合材料相当,均高于纯NBR,且损耗峰峰值高于1.19,有效阻尼温域（损耗因子不小于0.3）为36℃左右,具有良好的阻尼性能;NBR/AO-80/N220复合材料的储能模量（E′）大于NBR/AO-80复合材料,且随着N 220用量的增加,E′逐渐增大,NBR/AO-80/N220复合材料的拉伸强度、100%定伸应力、300%定伸应力和撕裂强度均逐渐提高,N220的最佳用量为30份;NBR/AO-80/N220复合材料具有良好的耐热老化性能。

The effect of the acrylonitrile content in NBR on the physical properties and dynamic mechanical properties of hindered phenol AO-60/NBR composite was investigated.The results showed that,the hindered phenol AO-60 had poor compatibility with NBR in which mass fraction of acrylonitrile was 0.41,but had good compatibility with NBR in which mass fraction of acrylonitrile was 0.34 or 0.26;the peak value of tanδ and tanδ peak area of hindered phenol AO-60/NBR composite increased when compared with those of NBR vulcanizate;when the mass fraction of acrylonitrile was 0.34 or 0.26,the damping property of the composite was improved more significantly;the tensile strength and elongation at break of vulcanized NBR in which mass fraction of acrylonitrile was 0.34 increased significantly when the hindered phenol AO-60 was added.

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.