Abstract
Accelerator N-cyclohexyl-2-benzothiazole sulfenamide (CZ) was chemically bonded onto the surface of (3-glycidoxypropyl)trimethoxysilane modified silica (m-silica) to obtain CZ modified silica (silica-s-CZ). There was a much thicker immobilized polymer layer approaching the surface of silica-s-CZ than that approaching the surface of m-silica, indicating an enhanced filler–styrene–butadiene rubber (SBR) interaction in the SBR/silica-s-CZ composites. Owing to the improved modification effect, the tensile strength and tear strength of SBR/silica-s-CZ composites are much higher than those of SBR/m-silica composites containing equivalent accelerator component. The highlight of this work lies in the fact that apparent improvement has been achieved by a novel surface modification method of silica with rubber accelerator, which is relatively easy to realize and manipulate compared to other sophisticated methods.
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