Investigation on the influence ofsilane coupling agent structure on the properties of nano-silica filled rubber compound

Silane coupling agent has long been used to enhance degree of reinforcement of silica in rubber matrix. recently various types of these coupling agents have been developed and commercialized. in the present study, two new silane coupling agents were introduced as dccyloxytriethyl silane and 5, 11 ,17-tritertbutyl- 2 3-trimethylsilylethynyl-25,26,27 ,28-tetrapropoxy calix(4)aren to compare the effect of generating van der waals interaction between tiller and polymer matrix that was originated by decyloxytri ethylsilane in comparison with π-π interactions that was due to 5, 11, 17-tritertbutyl-23-trimethylsilylethynyl-25,26,27,28tetrapropoxy calix(4)aren. cure characteristics and physicomechanical properties of a nano-silica filled nrj sbr polymer based compounds using these two agents were investigated and compared with commercialized si69. distribution of the filler in the rubber matrix was considered by scanning electron microscopy. these two suggest ions were presented coupling agent effects. decyloxytriethylsilane was shown better results due to the reduction of curative absorption and van der waals interactions between filler and polymer matrix in comparison with π-π interactions that was originated by the other coupling agent.