2-Hydroxyethyl methacrylate , glass

Hexafluoro-2-hydroxy-2-(4-fluorophenyl)propane (HFAF) was obtained from Central Glass Co., Japan, and was distilled under argon prior to use. Ethyl bromoacetate, methyl acrylate, acryloyl chloride, and methacryloyl chloride were obtained from Aldrich and were used as received. Hydroxyethyl methacrylate and hydroxypropyl methacrylate, also from Aldrich, were purified as described in the literature.6... 

This was conhrmed in 1967 by Kubin et al., who were the first to accomplish polymerization directly in a glass colnmn [13], The resulting swollen poly(2-hydroxyethyl methacrylate-co-ethylene dimethacrylate) gel, which was prepared in the presence of 1% cross-linker, was strongly compressed after pressnre application and consequently exhibited exceedingly low permeability (4.5mL/h for a 25 X 220 mm colnmn) and poor efficiency. 

In addition, compomers contain extra monomers from conventional composites, and these contain acidic functional groups. The most widely used monomer of this type is so-called TCB, which is a di-ester of 2-hydroxyethyl methacrylate with butane tetracarboxylic acid [271]. This acid-functional monomer is a very minor component and compomers also contain some reactive glass powder of the type used in glass-ionomer cements [266]. 

Glas-ionomer cements are acid-based materials (using, e.g., polyacrylic acid), whose setting reaction involves neutralization of the acid groups by powdered solid bases (calcium fluoro-aluminosilicate glasses). Resin-modified glass ionomer cements are hybrid materials prepared by the incorporation of polymerizable components such as 2-hydroxyethyl methacrylate. ... 

Fig. 1. Viscosity change of supercooled monomers as a function of temperature. Monomer HEMA (2-hydroxyethyl methacrylate). GMA (glycidyl methacrylate). Te glass transition temperature. Ts temperature of maximum polymerization rate...

Verhoeven, J. Schaeffer, R. Bouwstra, J.A. Junginger, H.E. The physico-chemical characterization of poly(2-hydroxyethyl methacrylate-co-methacrylic acid) 2. Effect of water, PEG 400 and PEG 6000 on the glass transition temperature. Polymer 1989, 30, 1946-1950. 

Yoshida M, Kumakura M, Kaetsu I (1979) Immobilization of enzymes by radiation-induced polymerization of glass-forming monomers 1. Immobilization of some enzymes by poly (2-hydroxyethyl methacrylate). Polymer 20 3-8... 

Bershtein, V.A., Gun ko, V.M., Karabanova, L.V. et al. 2010c. Hybrid polyurethane-poly(2-hydroxyethyl methacrylate) semi-IPN-silica nanocomposites Interfacial interactions and glass transition dynamics. J. Macromol. Sci. B Phys. 49 18-32. 

Additives used in final products Fillers aluminum, barium sulfote, aluminum hydroxide, glass fiber, mica, montmorillonite, Ni-BaTi03, nickel, silica, titanium dioxide, titanium fiber Plasticizers di-(2-ethylhexyl) phthalate, 2-hydroxyethyl methacrylate, 4-cyanophenyl 4-heptylbenzo-ate Antistatics copper dimethacrylate, glycerol monolaureate, indium tin oxide, lauramide diethanolamide, polyaniline, polypyrrole Antiblocking crosslinked siloxane particles Release magnesium stearate, methylpolysilsiquioxane, silicon nitride, stearic add Slip emcamide, slip ... 

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