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Silica is an important reinforcing agent (filler) in a rubber compound together with carbon black. On the other hand, silica-filled compounds can cause poor dispersion because of the strong filler-filler interaction by hydrogen bonding between the hydroxyl groups on the surface of silica. In addition, the formation of chemical bonds between hydrophilic silica and hydrophobic rubber are difficult. These phenomena are improved by the addition of organosilane as a silane coupling agent in rubber compound. The use of silica in combination with a silane coupling agent, which is often called the silica/ silane system, in the tyre industry improved the tyre performance such as the wet traction and rolling resistance, etc.. The silica/saline system has been studied extensively. Each of the active groups of the silane coupling agent is bonded between rubber and silica under certain conditions. Bis(triethoxysilylpropyl)tetrasulphide (TESPT) is used widely as a silane coupling agent in the tyre industry. The triethoxysilyl groups of TESPT react with the silanol groups on the silica surface during mixing, and the sulfur of TESPT reacts with the rubber chain during curing. Reuvekamp et al. examined the effects of time and temperature on the reaction of TESPT silane coupling agent during mixing. As discussed by Reuvekamp et al., a temperature of at least 130 oC is necessary Investigation of Reaction Rate of Bis(triethoxysilylpropyl)tetrasulphide in Silica-Filled Compound Using Pyrolysis-Gas Chromatography/Mass Spectrometry†

asian journal of chemistry/asian journal of chemistry

Investigation of Reaction Rate of Bis(triethoxysilylpropyl)tetrasulphide in Silica-Filled Compound Using Pyrolysis-Gas Chromatography/Mass Spectrometry