of natural rubber (NR) vulcanizates. However, the optimum silica/CB ratio giving rise to the optimum properties needs to
be clarified. In this research, reinforcement of NR with silica/CB hybrid filler at various ratios was studied in order to
determine the omum silica/CB ratio.
buildup resistance and rolling resistance, were determined. The results reveal that the vulcanizates containing 20 and 30 phr
of silica in hybrid filler exhibit the better overall mechanical propertie