A study of the Hardness and Wear Rate of Elastomer Composites Reinforced by Al2O3 and SiO2 Particles


This research deals with the study the effect of adding the silica particles andalumina particles separately with different ratio (5, 10, 15, 20, and 25 pphr) on thehardness and wear rate of natural rubber NR and styrene butadiene rubber SBR. Theresults show that the hardness increases with the increase the loading level of reinforcingparticles, while the wear rate decreases with the increase the loading level of thereinforcing particles. The largest value of the hardness and the lowest value of the wearrate were for styrene butadiene reinforced with 25 pphr of silica as compared withnatural rubber. Also the reinforcing by SiO2 increases the hardness and decreases thewear rate more than of Al2O3.The results indicated that the hardness and the wear rate for SBR and NRreinforced by SiO2 and Al2O3 at (25 pphr) illustrated in the following table: