Effect of silica co-modified by silane coupling agent/lauric acid on properties of solution-polymerized styrene-butadiene rubber composites

Abstract

Silica was co-modified by silane coupling agent γ-aminopropyl triethoxysilane （APTES) and lauric acid （LA), the co-modified silica/solution-polymerized styrene-butadiene rubber （SSBR) composite was prepared, and the effects of co-modified silica by APTES and LA on curing characteristics, mechanical properties, wet skid resistance, and rolling resistance of SSBR composites were studied. The results showed that the mass loss of silica between 30 ℃ and 200 ℃ decreased by 54%, and the agglomeration was significantly improved after the co-modification. The optimum curing time of co-modified silica/SSBR composite was 20.45 min, tensile strength reached 18.8 MPa, and loss factors at 0 ℃ and 60 ℃ were 0.678 8 and 0.100 3, respectively.

Keywords

• silane coupling agent， lauric acid; silica，co-modification， solution-polymerized styrene-butadiene rubber， mechanical property，