端巯基硅烷改性白炭黑填充丁基橡胶

Butyl rubber filled with silica modified by mercapto-terminated silane

采用端巯基硅烷偶联剂（KH-580）对白炭黑表面改性,研究了改性白炭黑对丁基橡胶力学性能和阻尼性能影响.结果表明：随着改性白炭黑用量的增加,丁基橡胶拉伸强度和断裂伸长率分别在30 phr时达到最大值和最小值;相比未改性白炭黑,改性白炭黑填充丁基橡胶在-40～80℃下,损耗因子（tan δ）值减小,有效阻尼温域略微变窄;在频率为0～20 Hz条件下,随着频率的增加,改性白炭黑填充丁基橡胶tan δ值和储能模量增大.KH-580有利于提高丁基橡胶和白炭黑之间的相容性.

The effects of modified silica using terminal mercapto silane coupling agent （KH-580）on the mechanical properties of butyl rubber and damping properties were studied. The results show that with the increasing amount of modified silica, tensile strength and elongation at break of butyl rubber reach a maximum value and a minimum value when the content of modified silica is 30 phr; compared to un- modified silica, the tan 3 of silica-filled butyl rubber decreases at--40-80℃, the perature range narrows slightly; in 0-20 Hz frequency, the tan 3 and storage modified silica increasing. KH-580 is benefit to improve the compatibility of but effective damping tem- modulus increase with yl rubber and silica.