Abstract: Tetrapod-like zinc oxide whisker (ZnOw) modified silicone rubber composites were prepared. The mechanical properties，thermal stability and damping properties of the composites were investigated. The fracture surface of the composites and the dispersion degree of ZnOw were observed by scanning electron microscopy (SEM). Results showed that the composites have decreased mechanical properties，but obviously increased thermal stability and damping properties with the increase in the amount of ZnO whisker. For the composite with 20 phr of ZnOw，the thermal decomposition temperature increased about 10℃，the damping factor maximum improved by 21% and the damping temperature range moved to higher temperature about 15℃ as compared with the pure silicone rubber.

摘要： 制备了四针状氧化锌晶须（ZnOw）/硅橡胶复合材料；详尽地研究了晶须改性硅橡胶复合材料的力学性能、热稳定性及阻尼性能；通过扫描电镜观察了材料的断面以及晶须在基体中的分散性。结果表明：随氧化锌晶须填充量的增加，硅橡胶的力学性能降低，热稳定性和阻尼性能有明显的提高。当填充量为20份时，与纯硅橡胶相比，复合材料的热分解温度提高了近10 ℃，最大损耗因子提高了21%，有效阻尼温域向高温偏移了约15 ℃。