Vinyltriethoxysilane

In which the ratio m/n is close to 3. The silane was produced by free radical copolymerization of vinyltriethoxysilane with N-vinylpyrrolidone. Its number-average molecular weight evaluated by vapour-phase osmometry was 3500. Porous silica microballs with a mean pore diameter of 225 A, a specific surface area (Ssp) of 130 m2/g and a pore volume of 0.8 cm3/g were modified by the silane dissolved in dry toluene. After washings and drying, 0.55% by weight of nitrogen and 4.65% of carbon remained on the microballs. Chromatographic tests carried out with a series of proteins have proved the size-exclusion mechanism of their separation. 

There are reactive softeners, some of which are N-methylol derivatives of long-chain fatty amides (10.241) while others are triazinyl compounds (10.242). The N-methylol compounds require baking with a latent acid catalyst to effect reaction, whereas dichloro-triazines require mildly alkaline fixation conditions. The N-methylol compounds are sometimes useful for combination with crease-resist, durable-press, soil-release and water-repellent finishes. In this context, the feasibility of using silane monomers such as methyltri-ethoxysilane (10.243), vinyltriethoxysilane (10.244), vinyl triace tylsilane (10.245) and epoxypropyltrimethoxysilane (10.246) in crosslinking reactions to give crease-resist properties and softness simultaneously has been investigated [492]. 

SYNTHESIS OF SYMMETRICAL trans-STILBENES BY A DOUBLE HECK REACTION OF (ARYLAZO)AMINES WITH VINYLTRIETHOXYSILANE trans-4,4 -DIBROMOSTILBENE Benzene, 1,1 -(1,2-ethenediyl)bis[4-bromo-, (E)- using Silane, ethenyltriethoxy- ... 

SYNTHESIS OF SYMMETRICAL frans-STILBENES BY A DOUBLE HECK REACTION OF (ARYLAZO)AMINES WITH VINYLTRIETHOXYSILANE frans-4,4 -DIBROMOSTILBENE... 

In 1960 there were three commercial coupling agents a methacrylate-chrome complex (Volan ), vinyltriethoxysilane, and aminopropyltriethoxysilane. There was little evidence that Volan or vinyl silanes on glass actually copolymetized with unsaturated resins in composites. It was even more difficult to explain how Volan was almost as good as aminopropylsilanes in epoxy composites. There... 

Under the same conditions, vinyltriethoxysilane reacts readily with diazomethane to yield the corresponding 1,3-cycloadduct, i.e. 3-triethoxysilyl-l-pyrazoline345. In contrast to 1-allylsilatrane, the degree of conversion of allyltriethoxysilane to the corresponding silyl-substituted cyclopropane is rather low (15%)37. 

Ormosil spin-coated thin films obtained from vinyltriethoxysilane and doped with jS-di-ketonates have been recently investigated by H. Wang and collaborators. Both hydrated chelates and temaiy complexes with phen and tppo were doped at a concentration of 5 mol% (relative to Si) by a multi step sol-gel method. Out of the 12 compounds tested, [Nd(tta)3(tppo)2] yielded the best results but no quantitative luminescence data are given, preventing comparison with materials of known properties (Wang et al., 2005). 

The Wettability of Ethyl- and Vinyltriethoxysilane Films Formed at Organic Liquid Silica Interfaces... 

Adsorbed films of ethykriethoxysilane and vinyltriethoxy-silane were formed on silica and alumina by retraction from hydrocarbon solution and their wettabilities and water-stabilities determined. The vinyltriethoxysilane films were generally more oleophobic, more hydrophobic and more resistant to contact with water than the films formed by the ethyl analog. Neither adsorbate formed stable films on a-alumina. The addition of low molecular weight organic acids or bases to the adsorbate solution resulted in both the ethyl and vinyl compound forming hydrophobic and water-stable films on silica and ot-alumina. Films of p-chloro-phenyl-ft-ethyltrichloro, -trimethoxy, and -triethoxysilane were also studied and found to be water-stable and to have wettabilities characteristic of a surface comprised of closely-spaced p-chlorophenyl groups. 

The present paper describes the adsorption of ethyltriethoxysilane (ETES) and vinyltriethoxysilane (VTES) at various organic-liquid/silica interfaces. Films formed by these compounds on silica and glass from solution in nonpolar organic liquids were found to be oleophobic and so could be isolated by retraction that is, the substrate on which the films had been formed emerged dry from the solution, thus allowing direct examination of the adsorbed layer. 

The Wettability of Films Produced by Vinyltriethoxysilane with Organic Acids and Bases... 

IPTES) (Si-MWCNT) with crossilinkable PMMA prepared from MMA monomer and vinyltriethoxysilane (VTES) (PMMA-VTES). The resulting Si-MWCNT/PMMA-VTES composites showed enhanced thermal conductivity and thermal stability. 

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