Si69 Modified Silicon Powder and Its Application in EPDM Compound
The silicon powder was modified by Bis-[-(triethoxysilane)-propyl]tetrasulfide Si69,and then thsurface modification of silica powder was filled in ethylene-propylene diene(EPDM)rubber.The properties of modified silica powder/EPDM rubber composites were stud-ied.By comparing the interface contact angle,oil absorption value and activation rate of silica powder before and after modification,and the prop-erties of silica powder/EPDM composite.The results showed that the coupling agent Si69 changed the surface structure of silicon powder and im-proved the compatibility and dispersion of silicon powder in EPDM compound.When the addition of Si69 was 2.5wt％,the comprehensive per-formance of modified silicon powder/EPDM compound was the best.
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