Rheological Effect of Zinc Surfactant on the TESPT-Silica Mixture in NR and S-SBR Compounds

Abstract

The effects of zinc surfactant (ZB) on the TESPT (bis(triethoxysilylpropyl)tetrasulfide)-silica mixture in NR (isoprene rubber) and S-SBR (solution butadiene-co-styrene rubber) were investigated, and their processability, dynamic, mechanical, heat build-up, blowout properties, and silica dispersion characteristics were compared. In the NR composite, the addition of ZB increased the reversion resistance time, tensile modulus, and blowout time and lowered the viscosity, heat build up, and tand values. In the S-SBR composite, the addition of ZB increased the heat build up, and tand values and lowered the reversion resistance time, tensile modulus, blowout time, viscosity, and tand values of the compound.Over all, in the NR compounds, addition of the ZB significantly increased the processability and mechanical property; however, in the S-SBR compounds, it increased the processability but it was not effective in improving mechanical property.

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

“…Zinc ion acted as a reaction initiator via formation of a polar bond with silanol groups on silica surface as explained by Norman. 53 During vulcanization, the zinc ion formed a ligand structure with polar molecules such as amines, acids, and esters, thus increased the vulcanization rate of the compound as explained by Bateman et al 3 and Kim et al [28][29][30][31][32]38 In this research, we observed that the addition of zinc ion containing accelerator (ZDBC) reduced the initiation time (t s2 ), however, showed a marching behavior compared to the non zinc ion accelerators (TMTD, DPTT, MBT, MBTS, CBS, NOBS). This matched with the explanations of Sae-Oui et al and others.…”

Moisture effects on improved hydrolysis reaction for TESPT and TESPD-silica compounds

“…Hydrophilic silica particles are not compatible with hydrophobic rubber matrix [1]. The modification of silica particles using a bifunctional silane has been found to improve processability, dispersion, and mechanical properties of the compound [1,2,[4][5][6][7][8][9][10][11]. The alkoxy silanes such as bis(triethoxysilylpropyl)tetrasulfide (TESPT) and bis(triethoxysilylpropyl) disulfide (TESPD) are the most commonly used in the green tire manufacturing industry.…”

Application of Acrylonitrile Butadiene Rubber for Management of Industrial Waste Silica

“…Tribological studies on SiO 2 / acrylate nanocomposites show that friction leads to the gradual loss of SiO 2 nanoparticles [25]. In the case that SiO 2 nanoparticles are applied in tires, one may expect them to be released by wear.…”