In addition, OTES can improve silica dispersion and only has a slightly negative effect on the physical properties of vulcanizates. Furthermore, the addition of OTES can extend the scorch time, especially in Si747 and OTES compounds. Silica is also the major constituent of sand. Therefore, silica is made out of two most abundant elements on earth. The molecular formula of silica is SiO 2. Silica is the name given for silicon dioxide. Our experimental results show that OTES is able to further react with the silica following reaction between the TESPT and silica and that it should be added when the molar amount of TESPT or Si747 is constant, to prevent reduction of the cross-link density. Silica is a compound made out of silicon and oxygen atoms. Conclusions The Emulsil silica masterbatch products demonstrate an excellent balance of performance for key tire properties.
#Silica compound free#
The processing ability of the silica-filled compounds and the performance of the vulcanizates were also investigated. Armstrong ProSweep Silica Free Sweeping Compound - 20 kg An ideal product specially compounded to act as a dust control medium when sweeping with a broom. The high quality of extrusion of the compound based on the Emulsil X4793 product, which includes the 250 m.sup.2/gm silica, is notable in comparison to the compound based on silica with 195 m.sup.2/gm surface area. The effect of the two hybrid silanes on the silica was investigated via Fourier transform infrared spectroscopy and thermogravimetric analysis. Two hybrid silanes, OTES and 3-mercaptopropylethoxy-bis(tridecyl-pentaethoxy-siloxane) (Si747) or OTES and bis(triethoxysilylpropyl)tetrasulfide (TESPT), were filled in silica-reinforced tread compounds. Chemically, silica is an oxide of silicon, viz., silicon dioxide, and is generally colorless to white. It can also suppress silica reaggregation during tire processing. Silica has widespread industrial applications including use as a food additive, i.e., anti-caking agent, as a means to clarify beverages, control viscosity, as an anti-foaming agent, dough modifier, and as an excipient in drugs and vitamins. To have it perfectly with one of silica, form a compound which ( pure, mix one part of the pounded stone is deliquescent in the air, and soluble in with. The monofunctional silane n-octyltriethoxysilane (OTES) can react with the silanol group of the silica surface and hence improve silica dispersion. The main difference in comparison with a carbon black compound is the amount of silane (6 phr) in the formulation. Here the carbon black is 100 substituted by silica.
The use of a silane coupling agent in silica-reinforced tread can effectively improve silica dispersion in the rubber matrix and strengthen the interfacial interaction between the rubber and filler this is beneficial to the enhancement of tire grip under wet conditions and reduces tire rolling resistance. A typical formulation for a tire compound with silica as filler is shown in table 1.
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