废旧子午线轮胎胶粉的再生研究

Study on Reclaiming of Ground Radial Tire Rubber

采用自制再生剂对废旧子午线轮胎胶粉进行再生研究,分析胶粉粒径、再生剂用量和软化剂用量对再生效果的影响。结果表明:随着废旧子午线轮胎胶粉粒径的增大,再生胶的邵尔A型硬度变化不大,拉伸强度和拉断伸长率减小;随着再生剂用量的增大,再生胶的门尼粘度减小,拉伸强度和拉断伸长率呈先增大后减小的趋势;随着软化剂用量的增大,再生胶的拉伸强度和拉断伸长率呈先增大后减小的趋势。当胶粉粒径为0.45mm、胶粉用量为100份、再生剂用量为7份、软化剂用量为3份时再生效果较好。再生胶用量对NR混炼胶物理性能影响较大。

The ground radial tire rubber was reclaimed by self-prepared reclaiming agent,and the effects of the particle size of ground radial tire rubber, additon level of reclaiming agent and softener on the physical properties of reclaimed rubber were investigated. The results showed that, with increase of the particle size of ground radial tire rubber ,the tensile strength and elongation at break of reclaimed rubber decreased,while the Shore A hardness changed a little. With the addition level of reclaimed a- gent increasing, the Mooney viscosity of reclaimed rubber decreased,and the tensile strength and elon- gation at break firstly increased and then decreased. With the addition level of softener increasing,the tensile strength and elongation at break of reclaimed rubber firstly increased and then decreased. The optimized reclaiming effect could be obtained when the particle size of ground radial tire rubber was 0.45 mm,and addition levels of reclaimed rubber,reclaiming agent and softener were 100,7 and 3 phr respectively. The addition level of reclaimed rubber had significant effect on the physical properties of NR compound.