偶联剂对再生橡胶结构与性能的影响

Effect of Coupling Agent on Structure and Properties of Reclaimed Rubber

研究硅烷偶联剂Si69和钛酸酯偶联剂201对废轮胎胎面胶粉再生橡胶结构与性能的影响。结果表明:随着硅烷偶联剂Si69用量的增大,再生橡胶的交联密度增大,门尼粘度呈减小趋势,拉伸强度变化较小,拉断伸长率先增大后减小;随着钛酸酯偶联剂201用量的增大,再生橡胶的交联密度变化不大,门尼粘度减小,拉伸强度先增大后减小,拉断伸长率增大;当再生条件及偶联剂用量相同时,添加硅烷偶联剂Si69的再生橡胶综合物理性能较好,拉伸断面平整,微米级颗粒及孔洞较少。

The effect of silane coupling agent Si69 and titanate coupling agent 201 on the structure and properties of reclaimed rubber from waste tire rubber powder was investigated. The results showed that,as the addition level of silane coupling agent Si69 increased,the crosslinking density of reclaimed rubber increased,the Mooney viscosity tended to decrease,the tensile strength changed little,and the elongation at break increased at first and then decreased. As the addition level of titanate coupling agent 201 increased,the crosslinking density of reclaimed rubber changed little,the Mooney viscosity decreased,the tensile strength increased at first and then decreased,and the elongation at break increased. When the conditions of regeneration and the addition level of coupling agents were the same,the comprehensive physical properties of reclaimed rubber with silane coupling agent Si69 were better,the tensile broken surface was smooth and had less micron particles and holes.