TRIETHOXYSILYLPROPYL TETRASULFIDE

A.M. Cabral, W. Trabelsi, R. Serra, M.P. Montemor, M.L. Zheludkevich, M.G.S. Ferreira, The corrosion resistance of hot dip galvanized steel and AA2024-T3 pre-treated with bis-[triethoxysilylpropyl] tetrasulfide solutions doped with Ce(N03)3, Corros. Sci. 48 (2006) 3740-3758. 

Manuf./Distrib. Power Chem. http //www. powerchemical. net Bis-(3-(triethoxysilyl) propyl) tetrasulfane CAS 40372-72-3 EINECS/ELINCS 254-896-5 Synonyms Bis (3-triethoxysilylpropyl) tetrasulfide... 

The hydrophilic nature of silica also affects the cure characteristics of rubber compounds, the properties of vulcanized rubber and also the compatibility with non-polar rubber such as natural rubber (NR). Silica retards the vulcanization as it reacts with zinc-accelerator-sulfur complex. These drawbacks can be overcome through the use of silane coupling agents. The most common silane coupling agent used is bis(3-triethoxysilylpropyl) tetrasulfide (TESPT). A silane... 

Figure 19.7 Schematic chemical reaction between halloysite nanotubes and natural rubber with bis(triethoxysilylpropyl)-tetrasulfide (Si-69) coupling agent. (Reprinted from ref. 53 with permission from Elsevier .)...

Furthermore Li et al. reported the use of a novel method (Two-Step Method, TSM) to investigate the modification process in preparation of rubber, silica, and bis(3-triethoxysilylpropyl) tetrasulfide (TESPT). The TSM modification indicated that the TESPT hydrolyzed firstly to generate the silanol (Si-OBT), and the silanol reacted with the hydroxyl groups on the surface of siUca. The properties of modified silica were studied and results exhibited the advantages of TSM, and also revealed that 8 % TESPT amount was suitable than 12 and 15 % TESPT amount [120]. 

In recent years, lamellar nanofiUers have been established as the most important filler type for barrier and mechanical reinforcement. Dal Point et al. reported a novel nanocomposite series based on styrene-butadiene rubber (SBR latex) and alpha-zirconium phosphate (a-ZrP) lamellar nanofiUers. The use of surface modified nanofiUers improvement the mechanical properties. However, no modification of the gas barrier properties is observed. The addition of bis(triethoxysilylpropyl) tetrasulfide (TESPT) as coupUng agent in the system is discussed on the nanofiUer dispersion state and on the fiUer-matrix inteifacial bonding. Simultaneous use of modified nanofillers and TESPT coupling agent is found out with extraordinary reinforcing effects on both mechanical and gas barrier properties [123]. 

Flame retardant lane/3-chloropropyl triethoxysi-lane/bis (3-triethoxysilylpropyl) tetrasulfide functionalized S1O2 and low-sulfur vulcanization NaA-dimethyl methylphosphonate/ [19]... 

Zeng, Z., Ren, W., Xu, C., Lu, W., Zhang, Y., and Zhang, Y. (2009) Effect of bis(3-triethoxysilylpropyl) tetrasulfide on the crosslink structure interfacial adhesion, and mechanical properties of natural rubber/cotton fiber composites. J. Appl. Polym. Sci., Ill, 437-443. 

Several approaches have been reported by Hu and coworkers to further improve the anticorrosion performance of electrodeposited silane sol—gel films. They found that adding proper concentration of nitrate ions into the silane deposition solution facilitated the electrodeposition process by reducing nitrate to nitrite, and thus enhanced the corrosion resistance of the films obtained [31]. Co-electrodeposition of silane with silica or titania nanoparticles [47,49], or Ce (N03)s [77], ako improved the films anticorrosion performance. Small content of nanoparticles was foimd to increase the compactness of the electrodeposited silane films. Ce(III) provided a self-healing effect for long-term immersion of the dip-coated Ce(III)-doped bis(triethoxysilylpropyl) tetrasulfide (BTSPS) films in... 

In here, at least one Y is hydrolyzable group, and X is a functional group such as iodine, sulfur, thiocyanate, thiourea, cyanide, etc., which is called bifunctional silane. When X is a hydrogen, it is called monofunctional silane. Two moles of 3-chloropropyltrialkoxysilanes react with one mole of disodium tetrasulphide produces bis-type bifimctional silane, which is called bis(triethoxysilylpropyl)tetrasulfide (TESPT) [171,172]. 

S. Wolff Crosslinking of Rubber Compounds with Bis-(3-triethoxysilylpropyl)-tetrasulfide International Rubber Conference (IRC), San Francisco, October (1976)... 

Montemor M. F. and Ferreira M. G. S. (2007a), Electrochemical study of modified bis-[triethoxysilylpropyl] tetrasulfide silane films applied on the AZ31 Mg alloy , Electrochim. Acta, 52,7486—95. 

SVET results obtained on the substrates pre-treated with the 1x10" M cerium nitrate doped bis-[triethoxysilylpropyl] tetrasulfide (BTESPT) silane solutions 8 hours after defect formation (A) and 2 days after defect formation (B). Results were obtained during immersion in 0.005 M NaCI. Scan size was 1 x1 mm. From Ref. 64. 

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