The surface of magnesium hydroxide(MH)is modified by using vinyltriethoxysilane(VTES),ethyltriethoxy silane(ETES),and(3-aminopropyl)triethoxysilane(APTES),respectively.The influence of the modification process on the surface properties of the modified MH particles is investigated.The optimal modification conditions are determined through the experimental study as follows:VTES is used as the modifier with a mass fraction of 8％,the reaction temperature is 80℃,the stirring speed is 500 r-min-1,and the reaction has performed for 2.0 hours.The modified MH is blended into silicone rubber.Compared to silicone rubber without MH,the tensile strength and elongation at break of the silicone rubber containing 50％of VTES-MH decrease by 5％and 11％,respectively.The VTES-MH/silicone rubber composite material with such a composition exhibits good mechanical properties,delivers a limiting oxygen index of 40.2％and shows excellent flame retardant performance.
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