Preparation of modified ultra-fine mineral powder and interaction between mineral filler and silicone rubber

Using quartz, talc and wollastonite as the initial minerals, silicone rubber reinforcement filler was prepared by ultra-fine crushing and surface chemical modifying with A-151 and B-5 coupling agent. The interaction between the silicone rubber matrix and the mineral filler was investigated from the aspects of the bound rubber in the uncured mix, the cross-linkage density in the relative vulcanite and the mechanical properties of the corresponding vulcanite. It was found that there are compact associations among the bound rubber in pure toluene, the total cross-linkage density and the tensile strength, and an association among the bound rubber in basic toluene, and the chemical cross-linkage density and modulus.