【摘要】 研究白炭黑含量和偶联剂种类对填充乳聚丁苯橡胶挤出流变特性的影响,并分析了三种偶联剂的接枝效率。结果表明:在低剪切速率下,白炭黑填充体系的非牛顿指数与其用量关系不大;在高剪切速率下,胶料的非牛顿指数随白炭黑用量增大而增大;当白炭黑用量为40份时,偶联剂Si747胶料粘度大,Payne效应明显,挤出物外观粗糙,有较好的挤出温度稳定性;偶联剂Si69与Si75对白炭黑的改性效果差别不大。更多还原

【Abstract】 The effects of silica content and silane coupling agents on the rheological properties of filled ESBR during extrusion were investigated,and the grafting efficiency of the 3 kinds of silane coupling agents was analyzed. The results showed that the non-Newton index of silica filled system was independent on its content at low shear rate. However,the non-Newton index of this system increased with the increasing of silica content at high shear rate. When the silica content was 40 phr,the viscosity and Payne effect of silica/Si747 compound was the highest,and the appearance of extrudate was rough. However,the extrusion temperature stability was better. The modification effects of Si69 and Si75 on silica were not significantly different.更多还原