Abstract
The surface treatment of glass beads, chosen as model filler, is carried out using four kinds of silane coupling agents with multilayer coverage. For this purpose, the silanes having aminopropyl or methacryloxypropyl group as an organofunctional group with two or three alkoxy group numbers are used. The amount of silane detected on the bead surface is 4–6 times that required for monolayer coverage. Using these treated beads, the effects of the organofunctional group and the alkoxy group numbers of silanes on the mechanical properties of the bead-filled poly(vinyl chloride), chosen as a typical ductile polymer, were investigated. Higher yield stress was observed in the silane with aminopropyl group than with methacryloxypropyl group. The effect of alkoxy group numbers was more effective in the dialkoxy than trialkoxy silanes. Scanning electron microscopy shows improvement in the interfacial adhesion by the silane treatment in the above order. The interfacial debonding at the yield point is depressed.
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