低门尼黏度再生胶在轿车轮胎胎面胶中的应用

Application of low Mooney viscosity reclaimed rubber in passenger car tire tread

将废旧轮胎胶粉通过剪切法和微氧法制备得到低门尼黏度再生胶,将其用于轮胎胎面胶中,并考察了再生胶种类及用量对胎面胶的硫化特性、物理机械性能、耐老化性能及微观结构等的影响。结果表明,与传统再生胶相比,加入低门尼黏度再生胶的混炼胶的正硫化时间缩短,Payne效应减弱,邵尔A硬度、100%和300%定伸应力、拉伸强度和耐老化性能都略有提高;硫化胶在60℃下的损耗因子降低,但在0℃下的损耗因子也略有降低;低门尼黏度再生胶在基体中分散性较好。含微氧法制备再生胶的硫化胶的热稳定性和耐溶剂抽出性能较剪切法和传统再生胶更好。

The recycled rubber with low Mooney viscosity was prepared from waste tire rubber powder by shear method and micro oxygen method and was used in tire tread rubber.The effects of the type and amount of recycled rubber on the curing characteristics,physical and mechanical properties,aging resistance and microstructure of tread rubber were investigated.The results showed that compared with the traditional reclaimed rubber,the positive curing time of the mixture with low Mooney viscosity reclaimed rubber was shortened,the Payne effect was weakened,and the Shore A hardness,modulus at 100%and 300%,tensile strength and aging resistance were slightly improved.The loss factor of vulcanizates decreased at 60℃,also decreased slightly at 0℃.The reclaimed rubber with low Mooney viscosity had good dispersion in the matrix.The thermal stability and solvent extraction resistance of the vulcanizates prepared by micro oxygen method were better than those prepared by shear method and traditional reclaimed rubber.