The Effect of Rice Husk Ash as a Filler for Epoxidized Natural Rubber Compounds

Abstract
The effect of rice husk ash (WRHA) as a filler in epoxidized natural rubber compounds has been studied. The mechanical properties viz tensile and tear strength were enhanced by the addition of WRHA. The optimum level of WRHA to obtain maximum mechanical properties was achieved at 20 phr after which there was deterioration in properties. Hardness and torque increased steadily with WRHA loading while scorch and cure time, t90 showed the opposite trend. The presence of silane coupling agent, γ-mercaptopropyl trimethoxy silane (A-189) has increased the effectiveness of WRHA as a filler for ENR compounds.

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