Effect of Different Inorganic Fillers on the Physical Properties of Styrene-Butadiene Rubber Vulcanizates

Abstract

The effect of different inorganic fillers such as lead silicate (amor phous or crystalline), burnt mazote boiler deposits (BMBD), aluminium oxide and ilmenite (FeTiO3) on the physical properties of different filled styrene- butadiene rubbers (SBR) has been investigated. The rate of vulcanization was increased according to the following order: lead silicate (amorphous or crystal line) > BMBD > aluminium oxide > ilmenite. Lead silicate of different types and BMBD were found to increase the tensile strength and resistance to abrasion. Dielectric constants (∈) for some of the com posites were determined. The lower (∈) values were obtained in the presence of aluminium oxide, burnt mazote and ilmenite while those obtained in the pres ence of different types of lead silicate were found to be higher.