Poly ethylacetate

PMBA The crystal is coated with a poly(butylmethacrylate) (PBMA) solution (0.1% in ethylacetate) and dimethoxyphenylacetophe-none (0.1% in acetone). DNA is grafted to the precoated crystal by irradiation with 365 nm UV light [15]. 

Polotskaya et al. (2010) developed polymeric membranes modified by fullerene Cgo for PV. Two polymers, PPO and poly(phenylene isophthalamide), were modified by fullereneCgo. The PV of the reacting mixture of EtOH-acetic acid-water-ethylacetate by fullerene-PPO membranes and that of the methanol-CYH mixture azeotropic point by fullerene-PA membranes were demonstrated on these new membranes. 

The first attempt to prepare poly(acryloyl chloride) from poly(acrylic acid) and thionyl chloride or phosphorus pentachloride was that by Staudinger [568]. Unfortunately, the polymer analogous reaction was not complete and he obtained only insoluble, probably highly cross-linked materials. Polymers are more conveniently prepared by free-radical polymerization of acryloyl [569 571] and methacryloyl chloride [572,573]. Linear polymers are obtained from the acyl halides if they are carefully purified and protected from moistme dming and after polymerization [574]. Free radical polymerization of acryloyl chloride was conducted in dichloroethane, ethylacetate, THF, dichloromethane, dioxane and cyclohexane. However, poly(acryloyl chloride) with high molecular weights could be obtained only in cyclohexane [575]. 

Deglycosylation of the polyarbutin gave poly(l,4-dihydroxy-2,6-phenylene). This polymer was different from the electrochemically synthesised polyhydroquinone, which is poly(l,4-dihydroxy-2,5-phenylene). Kobayashi and co-workers [194] synthesised a new kind of polyhydroquinone derivative with a mixture of phenylene and oxyphenylene units using peroxidases (horseradish and soybean) to catalyse the polymerisation of 4-hydroxyphenyl benzoate and the snbsequent hydrolysis of the resulting polymer (Scheme 12.18). Similarly, Tripathy and co-workers [195] synthesised a photoactive azopolymer, poly(4-phenylazophenol), via HRP-catalysed polymerisation in acetone and sodium phosphate buffer bilirubin oxidase (EC 1.3.3.5) was shown to catalyse the regioselective polymerisation of 1,5-dihydroxynaphthalene to a polymer in a mixed solvent composed of dioxane, ethylacetate and acetate buffer [196]. 

Values of the copolymer exchange rate constants k+ and k were reported only for solutions of poly(methyl methacrylate)-poly(methacrylic acid) in ethylacetate/methanol mixtures where micelles form with a poly(methyl methaciylate) core when the ethyl acetate volume fraction is above 80%. The rate constants k+ and k were found to be independent of the copolymer concentration and to be around 2 x 10 M s and 5 x 10 s, respectively, in the 90/10 (v/v) ethyl acetate/methanol mixture. Both rate constants were increased by a factor of about 2 when the methanol volume fraction was increased to 15%. The values of k+ are much lower than for a diffusion-controlled process, by several orders of magnitude. Thus there is significant barrier opposing the entry of the copol3rmer into the micelle, probably arising from the poly(methacrylic acid) corona that must be crossed by the insoluble block. 

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