METHACRYLOXYPROPYL TRIMETHOXYSILANE

In [276] the properties of kaolin-filled polyethylenes were investigated. The filler was pre-treated with silanes of two kinds, vinyl triethoxysilane (VTES) (I) and gamma-methacryloxypropyl trimethoxysilane (II). The results are presented in Table. 9. 

The hydrophilic/hydrophobic SIN composition of PDMS with poly(HEMA) and poly(AAC) were proposed as a potential apphcation for high-permeability soft contact lenses. Other sUicone-containing IPNs for contact lenses include polymerization of MMA in the presence of polymerized methacryloxypropyl trimethoxysilane, the cross-linking of a polymeric hydrogel of a copolymer of NVP during the final compression or injection-moulding process. 

Chemical derivatization of the capillary wall has also been used to alter the properties of the interface. Derivatization using trichlorovinylsilane followed by copolymerization with polyacrylamide is one approach. Another effective reagent is (o -methacryloxypropyl)trimethoxysilane, followed by cross-linking the surface-bound methacryl groups with polyacrylamide. 

Chemisorption. A key step in the development of a successful membrane modified FET is the adherence and longevity of the membrane and the success of the encapsulation procedure. Sudholter et al (35) have proposed a method for the attachment of the ion selective membrane to a silylated SiC>2 gate oxide. An organofunctional silane, for example methacryloxypropyl trimethoxysilane, forms a bond between the surface and a photocrosslinkable polymer (eg polybutadiene). The ionophore would be directly bound to the polymer backbone, thus eliminating the need for plasticiser. Without any further modification with ionophore the membrane is sensitive to pH and shows a long life time (some months). Similar approaches have also been proposed by other workers, eg (36)... 

Compared to the bulky VTIPS and MTIPS, the analogous trimethoxy-substituted silanes would be expected to hydrolyze to a much greater extent under the same reaction conditions. This is borne out by experiment the following table shows the percent of alkoxy groups that hydrolyze during the synthesis of silylated latexes containing 0.25 mol percent methacryloxypropyl trimethoxysilane (MTMS) and vinyl trimethoxysilane (VTMS), respectively. 

Shmykov, A.Yu.,MJakin,S.V.,Vasiljeva,l.V.etal. 2009. Electron beam initiated grafting of methacryloxypropyl-trimethoxysilane to fused silica glass. Applied Surface Science 255 6391-6396. 

Pore-filling MIP composite membranes had been first prepared by Dzgoev and Haupt [100]. They casted the reaction mixture into the pores of a symmetric microfiltration membrane from polypropylene (cutoff pore size 0.2 pm) and performed a cross -linking copolymerization of a functional polyacrylate for imprinting protected tyrosine. Hattori et al. [101] had used a commercial cellulosic dialysis membrane (Cuprophan) as matrix and applied a two-step grafting procedure by, (i) activation of the cellulose by reaction with 3-methacryloxypropyl trimethoxysilane from toluene in order to introduce polymerizable groups into the outer surface layer, (ii) UV-initiation of an in situ copolymerization of a typical reaction mixture (MAA/EDMA, AIBN) for imprinting theophylline. 

Silane coupling agents such as gamma-methacryloxypropyl trimethoxysilane have also been tried, by grafting them onto nanosilica particles. Compatibilisation can sometimes be further enhanced by functionalising the polymer as well, e.g., polypropylene may have to be treated with maleic anhydride in order to insert it between the layer planes of the clay. 

PMMA-Zr02 nanohybrid particles were synthesized via in-situ polymerization in the presence of surface-modified Zr02 (surface modification using a Y-methacryloxypropyl-trimethoxysilane [186, 187]). 

The traditional methods developed for a-chymotrypsin (CHT) involve the acrylation of protein surface to form vinyl groups, followed by silanization using trimethylsilane via derivatization with methacryloxypropyl trimethoxysilane to form CHT-SEN. This resulted in an increase of enzyme stability one to two orders higher of the CHT-SEN compared to the native CHT, and also extended enzyme activities at low pHs where the native CHT was inactive.- ... 

Ophthalmic grade 2-hydroxyethyl methacrylate (HEMA) and N,N-dimethylamino-ethyl methacrylate (DMA) were obtained from Polysciences (Warrington, PA). (3-AminopropyOtrimethoxysilane (APS), (3-methacryloxypropyl)trimethoxysilane (MPS), tetraethylene glycol diacrylate (TEGDA), dimethoxyphenyl acetophenone (DMPA), poly-(2-hydroxyethyl methacrylate), trisodium orthophosphate, citric acid, and boric acid were obtained from Aldrich (Milwaukee, WI). Triethanolamine... 

Fabry-Perot etalon devices based on materials sensitive to electric fields have been studied as tuneable optical filters. Gan et al. [165] presented in their work a hybrid organic/inorganic sol-gel material based on 3-methacryloxypropyl trimethoxysilane as precursor and TCBD (15% mol) as NLO chromophore that was covalently incorporated into the silica network. They demonstrated an optical filter having large tunability and high finesse. The EO sol-gel film was corona poled with 5 kV/cm at 170°C for 30 min. 

Santilli, C.V., Sarmento, V.H.V., Dahmouche, K., Pulcinelli, S.H., and Craievich, A.F. (2009) Effects of synthesis conditions on the nanostructure of hybrid sols produced by the hydrolytic condensation of (3-methacryloxypropyl) trimethoxysilane. Journal of Physical Chemistry C, 113,14708-14714. 

Aparicio, M., Lecoq, E., Castro, Y., and Duran, A. (2005) Proton conducting organic/inorganic sol-gel membranes produced from phenyltriethoxysilane and 3-methacryloxypropyl trimethoxysilane. 

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