Preparation of dispersible nanosilica surface‐capped by hexamethyl disilazane via anin situsurface‐modification method and investigation of its effects on the mechanical properties of styrene–butadiene/butadiene rubber

Abstract

Silica has been established as one of the most promising materials in green tires. The filler–rubber interactions can increase the comprehensive performance of rubber composites. In this study, sodium silicate was used as the silicon source and hexamethyl disilazane (HMDS; molecular formula: C6H19NSi2) was used as a modifier to synthesize dispersible silica (DNS) via an in situ surface‐modification method. The effects of the HMDS‐capped silica on the properties of rubber–matrix composites made of styrene–butadiene rubber (SBR) and high‐cis‐polybutadiene rubber (BR9000 or BR) were investigated with Zeosil 1165MP (Z1165‐MP; a commercial highly dispersible silica produced by Rhodia for the production of green tires in the rubber industry) as a reference. The results show that the SBR–BR–DNS composite was before the SBR–BR–Z1165‐MP composite in increasing the tear strength and elongation at break and reducing the compression heat buildup. On the basis of the resulting properties, the reinforcing behaviors in the rubber–matrix composites were analyzed. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47763.

Study on the Mechanism and Experiment of Styrene Butadiene Rubber Reinforcement by Spent Fluid Catalytic Cracking Catalyst

“…In the process of tire preparation, the amount of filler accounts for more than 1/3 of the amount of tire rubber formula, and is becoming one of the most important materials in the tire rubber composition [ 7 , 8 ]. Compared with the high economic cost and serious environmental pollution caused by traditional fillers (carbon black), the “green tire” has become the main direction of automotive tire design and development [ 9 , 10 , 11 , 12 ].…”

Effect of SiO2 surface modification on the filler‐reinforced interfaces in SiO2‐filled functional styrene butadiene rubber composites

“…9,14 Silane coupling agents such as bis(3-triethoxysilylpropyl) tetrasulfide (Si69) and hexamethyldisilazane (HMDS), can be incorporated into the surface of silica, thereby significantly increasing the dispersion and improving the mechanical properties of rubber matrix composites. [15][16][17][18][19][20][21][22] Under optimal mixing conditions, using Si69 significantly minimizes the agglomerate formation and enhances the rubber-filler compatibility. 23 However, in rubber-filler dispersion, the quantity of coupling agent utilized is a crucial factor; increasing the amount of coupling agent may result in complicated viscoelastic properties of the rubber.…”

“…A widely used method for modifying the surface of SiO 2 particles is to chemically bond a silane agent through a reaction involving the alkoxy groups of the silane and the hydroxyl groups present on the SiO 2 surface 9,14 . Silane coupling agents such as bis(3‐triethoxysilylpropyl) tetrasulfide (Si69) and hexamethyldisilazane (HMDS), can be incorporated into the surface of silica, thereby significantly increasing the dispersion and improving the mechanical properties of rubber matrix composites 15–22 . Under optimal mixing conditions, using Si69 significantly minimizes the agglomerate formation and enhances the rubber‐filler compatibility 23 .…”

Preparation and performance of oleylamine modified silica‐reinforced natural rubber composites

“…Studies had shown that it was because the surface of silica was covered by surfactant, which reduced the exposure of the silanols. 22,23 In summary, the reduction of silanol on the surface of silica can improve its compatibility with rubber matrix.…”