隔震支座用天然橡胶/丁腈橡胶/受阻酚AO-60复合材料的制备与性能研究

Preparation and Properties of NR/NBR/Hindered Phenol AO-60 Composites for Seismic Isolation Bearing

将丁腈橡胶(NBR)/受阻酚AO-60杂化材料(简写为NBR/AO-60)与天然橡胶(NR)共混,制备NR/NBR/AO-60复合材料。利用透射电子显微镜、差示扫描量热仪、动态力学分析仪和橡胶加工分析仪研究复合材料的微观结构、阻尼性能和物理性能。结果表明:NR与NBR/AO-60的相容性较好,当NR/NBR/AO-60质量比为50/50/20时,复合材料存在部分双连续相结构;随着NBR/AO-60质量增大,复合材料在-20～+40℃温度范围和0～150%应变范围内的损耗因子大幅增大,表现出满足隔震支座所需的高阻尼性能。高阻尼、高强度和高柔性的NR/NBR/AO-60复合材料(质量比为50/50/20)在橡胶隔震支座领域具有良好的应用前景。

By blending NBR/hindered phenol AO-60 hybrid materials（abbreviated as NBR/AO-60）with NR,the NR/NBR/AO-60 composites were prepared. The microstructure,damping property and physical properties of the composites were investigated by transmission electron microscopy,differential scanning calorimetry,dynamic mechanical analyzer and rubber processing analyzer. The results showed that,the compatibility of NR with NBR/AO-60 was good,and when the blending ratio of NR/NBR/AO-60 was 50/50/20,the composites exhibited a co-continuous morphology. With the weight of NBR/AO-60 increasing,the loss factor of the composites increased significantly within the temperature range of -20～＋40 ℃ and the strain range of 0～150%,which showed the high damping property to meet the application requirements of seismic isolation bearing. This NR/NBR/AO-60 composites（blending ratio was 50/50/20）which possessed high damping,high strength and high flexibility had good application prospects in the field of rubber seismic isolation bearing.