Vinyl trimethoxy silane

The observation of the spectrum for styrene polymerized on the surface of silane-treated silica and of the difference spectrum of polystyrene adsorbed on the surface of silica have revealed that there are absorption bands of atactic polystyrene at 1602, 1493, 1453, 756, and 698 cm. The absorption bands at 1411 and 1010 cm are related to vinyl trimethoxy silane, and C of the difference spectrum is below the base line. This indicates that the vinyl groups of silane react with styrene to form a copolymer. 

In PE/aluminium laminates, which are used for packaging, the bond strength can be improved by surface oxidation of the polymer. An alternative to surface oxidation is to use copolymers of ethylene and monomers containing polar groups that can provide stronger bonds to metal thus increasing adhesion [24,25]. The effects of three functional groups in ethylene copolymers, namely EVS [polyethylene-co-vinyl trimethoxy silane], EBA [polyethylene-co-butyl acrylate], EAA [polyethylene-co-acrylic acid) on the adhesion was studied [25]. The interface in polymer/metal laminates has been analysed by FT-IR... 

In order to elaborate the reactivity profile of compounds 3a - 3d, the rate constants of the first hydrolysis step were determined by H NMR spectroscopy (pH = 4 or 9, 30-fold molar excess H2O). In addition to the methylene-bridged silanes 3a - 3d, 3-methacryloyloxypropyl-trimethoxysilane 3e, propyl trimethoxy silane 4a, vinyl trimethoxy silane 4b, as well as butyric acid... 

Vinyl trimethoxy silane CH2=CHSi(OCH3)3 526 None Water (pH 4.0-4.5)... 

The choice of peroxide used is determined by the temperature of its decomposition. Peroxide should be effectively dispersed in the polymer melt brfore a substantial homolysis of 0—0 bonds can occur. For such a purpose, dicumyl peroxide which may be dissolved in vinyl trimethoxy silane (b.p. 120 °C) is suitable. The required degree of crosslinking was attained if 2 % w. of silane with 5-10% w. of peroxide were added to polyethylene. At the silylation, grafting should not commence before both compounds (peroxide, ane) are well dispersed in the polymer melt [141]. NonhcMno-geneous dispersion of additives reduces efficiency of grafting and of subsequent crosslinking. 

APS - aminopropyl triethoxy silane CS - chloropropyl trimethoxy silane VS - vinyl trimethoxy silane MS - mercapto butyl trimethoxy silane ES - epoxy trimethoxy silane... 

Copolymer of vinyl imidazole (VI) and vinyl trimethoxy silane (VTS)... 

Copolymer of vinyl imidazole and vinyl trimethoxy silane films on Cu IRRAS, SEM Effect of copolymer composition on Cn corrosion protection at 360°C in air 1129... 

Ito et al. examined the ESR spectra of surface modified silica filled SBR unvulcanizates to get information on the filler/rubber interactions. The ESR spectra of vinyl trimethoxy silane (VS) modified silica filled SBR unvulcanizates (U-VS) and (bis(triethoxysilyl propyl)-tetrasulfide (TESPT) modified silica filled SBR unvulcanizates (U-TESPT) measured at —100 °C and at dilferent initial strains are shown in Figure 25.28(a) and (b), respectively. It is found that the intensity of signals increases with increasing initial strain without changes in... 

Several companies have experimented with the use of vinyl oiganosUanes as cross-linking agents. For example, 2 percent of vinyl trimethoxy silane is first activated by 0.1 percent of dicumyl peroxide and grafted onto the thermoplastic polymer. The system is kept dry to stabilize the methoxy groups. After melt processing, the solid product is exposed to moisture to hydrolyze the methoxy groups, which then condense with each other to form cross-links. 

Flax fibers are stronger, crisper, and stiffer to handle, and more easily wrinkled due to their crystalline nature. Flax fibers are about 12-16 pm in diameter. Effect of various treatments such as maleic anhydride (MAH), maleic anhydride-PP copolymer (MAPP), and vinyl trimethoxy silane (VTMOS) have been studied on flax fibers (natural flax and flax pulp) and PP composites. These composites were characterized by FTIR to study the effect of treatment and by dynamic contact angle (long fibers) and capillary rise (pulp) to determine the surface energy values. All these three treatments reduced the polar component of the surface energy of the fibers. The composites prepared with MAPP treated PP exhibited highest... 

Vinyl trimethoxy silane y-Methacrylox3rpropyl trimethoxysilane P -Methacryloxyethox3d rimethoxysilane... 

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