丁苯胶/气相法白炭黑纳米复合材料的微观形态与力学性能

Morphology and Mechanical Properties of Styrene- Butadiene-Rubber/Fumed Silica Nano-Composite Materials

研究了改性或未改性气相法白炭黑和粘合剂RH对丁苯胶/气相法白炭黑纳米复合材料微观结构及力学性能的影响。改性气相法白炭黑比未改性气相法白炭黑对丁苯胶具有更好的补强性能,提高了纳米复合材料的模量和强度。与单独添加改性气相法白炭黑体系相比,粘合剂RH和改性气相法白炭黑的复合使用进一步提高了纳米复合材料的力学性能,拉伸强度和撕裂强度分别提高64%和33%。扫描电子显微镜的表征结果显示,改性气相法白炭黑的分散性优于未改性气相法白炭黑。回弹性及压缩屈挠实验分析结果表明,添加粘合剂RH可提高纳米复合材料的回弹性。

Effects of modified and unmodified fumed silica, and adhesive agent RH on morphology and mechanical properties of styrene - butadiene - rubber （ SBR ）/fumed silica nano - composite were studied. Modified fumed silica was treated with modifier Si69. Reinforcement effect of modified fumed silica to SBR were superior to that of unmodified fumed silica. Addition of both adhesive agent RH and modified fumed silica improved comprehensive mechanical properties of nano - composite. Tensile strength and tear strength increased by 64% and 33% respectively, comparing with sole addition of modified fumed silica. By means of SEM the dispersion of modified fumed silica was better that of unmodified fumed silica. Addition of adhesive agent RH could enhance rebound resilience of system. Compression deflection test indicated that modified fumed silica could decrease temperature rise and permanent set in compression.