硅橡胶和丁基橡胶共混体系的阻尼特性研究

采用机械共混法制备了硅橡胶/丁基橡胶复合材料。研究了丁基橡胶用量对复合材料力学性能、热稳定性和阻尼性能的影响。结果表明，随着丁基橡胶用量的增加，复合材料的力学性能和热稳定性出现降低的现象，但阻尼性能有显著提高。当丁基橡胶用量为100份时，与纯硅橡胶相比，复合材料的有效阻尼温域从0 ℃拓宽到近75 ℃，最大损耗因子从0.11提高到0.80，玻璃化转变温度向高温偏移了8 ℃左右。

Damping Properties of Silicone Rubber and Butyl Rubber Blends

Blends of siloxane and butyl rubbers were prepared via mechanical blending. The influence of butyl rubber content on the mechanical property, thermal stability, and damping properties of the composites were investigated. It was found that, with increasing content of butyl rubber, the mechanical property and thermal stability decreased, but the damping properties increased obviously. When the dosage of butyl rubber were 100 phr, the effective damping temperature range (tanδ>0.3) of the composites was broadened from 0 ℃ to 75 ℃, the maximum loss factor was increased from 0.11 to 0.80, and the glass transition temperature increased by 8 ℃, compared with neat silicone rubber.