超细粉碎表面改性透辉石增强橡胶材料

Ultfine Surface Modification Diopside Used in Reinforced Rubber Material

采用硬脂酸、铝酸酯和硅烷偶联剂3种改性剂分别对超细透辉石粉体进行表面改性,通过接触角和活化指数评价表面改性效果,同时以硬度、扯断强度、扯断伸长率、定伸强度、扯断永久变形和抗老化性能为量化指标分析了改性透辉石粉体取代炭黑作为橡胶填料的力学性能。结果表明,硅烷偶联剂对超细透辉石粉体的改性效果好,并且对橡胶有较好的补强效果,这是因为活化改性增强了透辉石填料与聚合物基体的结合强度,因此能全部或部分代替炭黑等常规橡胶填料,从而降低橡胶生产成本。

Three surface modifiers（stearic acid,aluminate coupling agent,silane coupling agent）were used to treat ultfine diopside powder respectively.By the contact angle and activation index for assessing the surface modification effect,and hardness and tensile strength at break,elongation at break,stretching stress,tensile set at break and hot air aging as quantitative indicators analyzed the mechanical properties of rubber which using modified ultfine diopside powder as the filler instead of carbon black.The results show that silane coupling agent has better surface modification effect on ultfine diopside ultfine powder than the other two surface modifiers,and the modified ultfine diopside powder has better reinforcement effect on rubber than carbon black.This is due to the activation of modified enhances the strength of bond between diopside filler and polymer matrix.Therefore,the modified ultfine diopside powder in whole or in part instead of carbon black or other conventional rubber filler can reduce the cost of rubber production.