2-hydroxy ethyl methacrylate

Hydroxy-containing polymers such as poly(methyl-methacrylate-co-hydroxyethyl methacrylate) [65,66] or secondary cellulose acetate [67,68] were used for this purpose. Vanadium (V) 8-hydroxy quinoline-hydroxy-ethyl methacrylate adduct, prepared by condensation of the latter with a VOQ2OH complex, is polymerized to... 

The y-radiation-induced grafting of diethylene glycol dimethacrylate and its mixture with (3-hydroxy ethyl methacrylate in ethanol-water systems onto silicone rubber has been reported [ 164]. The grafting yield increases as the radiation dose, concentration of monomer and concentration of transfer agent increase. At the same radiation dose, the degree of grafting decreases, as the dose level increases. However, at the same dose rate, the grafhng level increases with radiation dose. 

Kragl and Dreisbach (1996) have carried out the enantioselective addition of diethyl zinc to benzaldehyde in a continuous asymmetric membrane reactor using a homogeneous soluble catalyst, described in their paper. Here a,a-diphenyl-L-proline was used as a chiral ligand, coupled to a copolymer made from 2-hydroxy ethyl methacrylate and octadecyl methacrylate, which had a sufficiently high molecular weight to allow separation by ultra-filtration (U/F). The solvent-stable polyaramide U/F Hoechst Nadir UF PA20 retained more than 99.8% of the catalyst. The ee was 80 %, compared to 98 % for a noncoupled catalyst. 

NA Peppas, HJ Moynihan. Structure and physical properties of poly(2-hydroxy-ethyl methacrylate) hydrogels. In NA Peppas, ed. Hydrogels in Medicine and Pharmacy, Vol II Polymers. Boca Raton, EL CRC Press, 1987, pp 49-64. 

Functional Group Methacrylate Monomers. Hydroxy ethyl methacrylate and dimeth-ylaminoethyl methacrylate produce polymers having the following formulas ... 

Murray et al. (2) prepared permeable membranes for selectively removing phosphate, nitrate, and ferric cations by polymerizing and crosslinking with the modified matrix monomer, (bis-acrylamindo-phenanthroline)dinitrate, (IV), to produce an ion permeability substrate. Kulkami et al. (3) selectively removed cobalt cations from solution using 2-hydroxy ethyl methacrylate copolymers,... 

Research Focus Synthesis of high refractive index monomers of mono- and dimethacry-lates containing thiophene and disulfide for crosslinking with 2-hydroxy-ethyl methacrylate. 

Figure 3. Effect of polymer concentration on the viscosity changes on reaction between styrene-hydroxy ethyl methacrylate copolymer (2.2 mole % HEMA) and hexamethylene diisocyanate in toluene at 80° C. [2VCO]0 [OH 0 = 1. Polymer concentrations 0.047% (gram/dl.) (%), 0.134% (gram/dl.)...

Preparation and Characterization of Styrene—Hydroxy ethyl Methacrylate Copolymers... 

To study the internal crosslinking of styrene-hydroxy ethyl methacrylate copolymers, it was necessary to prepare a range of well characterized materials containing only low concentrations of hydroxyethyl methacrylate. To ensure that the copolymers were of uniform composition, only low monomer conversions were used so that the composition of the monomer mixtures did not change appreciably during the reaction. Low polymerization temperatures were used to obtain high molecular weight copolymers. 

A container was charged with a solution of Vazo 52 catalyst and 2,2 -azobis(2,4-dimethyl pentane nitrile) (4.5 g) dissolved in acetone (600 g) a second container was charged with methyl methacrylate (540 g) and 2-hydroxy ethyl methacrylate (180 g). The first and second containers were uniformly fed into a reactor for 330 and 240 minutes, respectively, and then refluxed for 1 hour. After standard workup the product was isolated in 100% yield, having aMn of 30,308 daltons, Mw of93,195 daltons, and a PDI of 3.07. 

Bovine Plasma Protein Adsorption onto Radiation-Grafted Hydrogels Based on Hydroxy ethyl Methacrylate and N-Vinyl-pyrrolidone... 

In many cases the organic to be dehydrated (e.g., acetic acid) attacks the ether linkage in the PVA membrane. Indeed, the PVA membrane has very limited fife in the presence of most acids. Ray et al. [14] used the concept of copolymer membranes to dehydrate acetic acid over the entire range of concentration from 0% to 100%. These investigators prepared copolymers of acrylonitrile (AN) with different hydrophUic monomers like hydroxy ethyl methacrylate, acrylic acid, methacrylic acid, and itaconic acid. These copolymers have carbon-carbon bonds, which unlike the ether linkage in the cross-hnked PVA membrane are stable to the attack by carboxyhc acids. The acrylonitrile part is not sufficiently hydrophihc but imparts mechanical strength while the other monomers improve the hydrophilicity. The overall result is an efficient yet stable membrane. Variation of the ratio of AN to (the other) monomer allows freedom of adjusting the hydrophUicity of the membrane to achieve certain... 

Fig. 2 Bovine serum albumin adsorption on microbeads at two different ionic strength (IS) (A) plain poly (hydroxy ethyl methacrylate) (PHEMA) (B) Congo Red-derivatized PHEMA (C) Congo Red-Cu(II)-derivatized PHEMA. (From Ref. [13].)...

Another procedure that has been followed is synthesizing a monomer with the active substance, and then polymerizing this new molecule. Chloramphenicol has thus been attached to a methacrylic derivative by an acetal function, and then copolymerized with 2-hydroxy ethyl-methacrylate (148). The copolymer can then, in addition, be dispersed into a biocompatiblenondegradable polymer such as Eudragit, playingthe role of a polymer matrix (149). 

Hydroxy Ethyl Methacrylate N-vinyl Pyrrolidinone FIG. 1. Common graft monomers. 

Monomers, such as n-vinyl pyrrolidinone and hydroxy ethyl methacrylate, have been used to enhance the biocompatibility of films and to control the air permeation and hydrophilicity of microporous films and of non-woven polyolefin materials [10], Significant opportunities exist to pursue other uses in the bio-materials area [11, 12], Attempts to produce grafted films to control gas permeation for use in food packaging applications have not met with success [13], Co-extruded films have proven to be more acceptable in this food packaging area. The modification of films and non-woven materials rely upon low-voltage, self-shielded electron beams. The development of lower cost, low-voltage EB equipment reduces the economic barriers to further development in this area (Fig. 4) [14, 15],... 

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