SCHEDULED MAINTENANCE
Effect of catalyst onin situ silica reinforcement of styrene–butadiene rubber vulcanizate by the sol–gel reaction of tetraethoxysilane
Abstract
In situ silica reinforcement of styrene–butadiene rubber
(SBR) vulcanizate has been achieved by the sol–gel reaction of
tetraethoxysilane (TEOS) using n-butylamine as a catalyst. SBR
was vulcanized with sulfur and soaked in TEOS and in an aqueous solution
of the catalyst. When hydrochloric acid was used as a catalyst for the
sol–gel reaction, silica particles were not introduced into the SBR
matrix in this study. The increase of the dynamic modulus and tensile
strength at break was considered to be due to the interaction between the
rubber and the in situ silica filler in the SBR
vulcanizate.
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