高岭土在橡胶中的应用性能研究

Study on Application Properties of Kaolin in Rubber

研究高岭土与炭黑N660、沉淀法白炭黑对天然橡胶(NR)补强性能的差异,并考察高岭土部分替代炭黑N660在子午线轮胎气密层胶中的应用。结果表明,高岭土对NR的补强作用优于未加偶联剂的沉淀法白炭黑,接近炭黑N660,其中改性高岭土对NR的补强效果优于普通高岭土;采用少量高岭土尤其是改性高岭土等量部分替代炭黑N660,气密层胶料拉伸强度提高,加工性能和其他物理性能变化不大。在橡胶配方中用高岭土部分替代炭黑具有可行性,可降低原材料成本,同时节能降耗。

The reinforcement of natural rubber(NR) using kaolin was studied and compared with carbon black N660 and precipitated silica,and the application of kaolin in the inner liner compound of radial tire to replace part of carbon black N660 was investigated.The results showed that the reinforcing effect of kaolin on NR was better than that of precipitated silica without coupling agent,and was close to that of carbon black N660.The reinforcing effect of the modified kaolin on NR was better than that of the unmodified kaolin.Using a small amount of kaolin,especially modified kaolin,to replace part of carbon black N660 in equal amount,the tensile strength of the inner liner compound was improved,and the processability and other physical properties changed little.It was feasible to partly replace carbon black with kaolin in rubber formulation,which could reduce the cost of raw materials and energy consumption.