The Effect of Bis(3-Triethoxysilylpropyl) Tetrasulfide on Silica Reinforcement of Styrene-Butadiene Rubber

Abstract

Bis(3-triethoxysilylpropyl)tetrasulfide (TESPT) was found to affect the curing characteristics and the physical properties of styrene-butadiene (SBR) gum rubber and xin situ silica-filled SBR vulcanizates. Silica incorporated by the in situ sol-gel reaction of tetraethoxysilane with TESPT showed a much higher reinforcing efficiency than did conventional mechanical mixing and the in situ method without TESPT. The higher reinforcing efficiency is attributed to the formation of a silica-rubber network, which also changed the dynamic mechanical behavior of the SBR vulcanizates. Transmission electron microscopy observations showed in situ silica incorporation of very fine particles in comparison to the sol-gel process without TESPT.

Using a silanized silica nanofiller to reduce excessive amount of rubber curatives in styrene‐butadiene rubber

“…For example, tensile modulus at 100% strain amplitude improved, whereas, elongation at break deteriorated as crosslink density was increased. 23 The Dtorque of the TMTD cured rubber was larger (Table I), which indicated a higher crosslink density. This explained the differences in the mechanical properties of the two rubbers for example the tensile modulus and elongation at break (Table II).…”

Effects of Accelerators on the Vulcanization Properties of Silica vs. Carbon Black Filled Natural Rubber Compounds

“…And then they formed a 3-dimensional network structure between silica and rubber chain. 14,21,[35][36][37]60 Overall, comparing the silica/NR and the CB/NR compounds with various accelerators, the t s2 , t 10 , and t 90 values of the silica filled compounds showed longer than those of the CB filled ones, respectively. This was due to polar characteristic of silica surface 53 and water molecules in the compound.…”

Significantly improved performance of rubber/silica composites by addition of sorbic acid

“…[1][2][3][4][5] However, numerous hydrophilic silanols exist on the silica surface, resulting in strong filler-filler interactions and poor affinity toward hydrocarbon rubbers, such as styrene-butadiene rubber (SBR). [6][7][8] It is well accepted that dispersion and interfacial bonding are two crucial factors in determining the ultimate performance of rubber/silica composites. 6 Owing to unsatisfactory dispersion and interfacial interactions, the performance of pristine silica-filled SBR compounds in areas such as strength and abrasion resistance hardly meets the requirements for high-performance rubber products.…”