Ethyl methacrylate copolymer

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,... 

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. 

The liquid phase of the dispersions contained, by weight, 99% methyl methacrylate, 0.5% distilled dimethyl-p-toluidine, and 0.5% ultraviolet absorber. Matrices used for volume concentration effects contained 5% ethylene dimethacrylate and 10% methyl methacrylate-ethyl methacrylate copolymer with methyl methacrylate monomer reduced to 84%. Matrices containing 5% additives (described above) contained 15% triethylene glycol dimethacrylate with methyl methacrylate reduced to 79%. 

Amphomer . [Nat l. Starch Chem.] Octylactyiamide/acrylates/bulylamino-ethyl methacrylate copolymer hair fixative resin for setting lotions, c< -ditioners. 

In another work, Velasco-Santos et al. measured reasonably large increases in modulus from 0.71 GPa for a methyl-ethyl-methacrylate copolymer to 2.34 GPa at 1 wt% arc-MWNT. This corresponds to a reinforcement of d T/d Ff 272 GPa which is on a par with the value (scaled) for PVA composites from Cadek et al However, in this work no nucleation of crystallinity was observed. This suggests that good stress transfer can be obtained at an amorphous interface, depending on the polymer. 

Amrani and co-workers [48] have used fluorescence measurements of energy transfer from donor to acceptor for studies of polymer compatibility. They labelled methyl methacrylate-ethyl methacrylate copolymer and/or methyl methacrylate-butyl methacrylate copolymer with donor-naphthalene and polymethyl methacrylate with acceptor-anthracene. The variation in the ratio of donor to acceptor fluorescence was plotted as a function of butyl methacrylate and ethyl methacrylate in the copolymer and gradual increase of the ratio corresponded to gradual transition from two-phase to a one-phase system. The fluorescence technique was found to be more sensitive to small changes of compatibility of the polymers. 

Pekel, N., ahiner, N., Giiven, O., and Rzaev, Z. M. 2001. Synthesis and characterization of JV-imidazole-ethyl methacrylate copolymers and determination of monomer reactivity ratios. European Polymer Journal 37 2443-2451. 

The chlorinated alkanes have proven useful for solubilizing lower molecular weight polymers and oligomers. As detailed in the alkane and alcohol chapters, dichloro-methane (DCM) has been used in conjunction with methanol and heptane gradients for the characterization of polystyrenes [272] and styrene/ethyl methacrylate copolymers [649] and with heptane for co-poly (styrene/acrylonitrile) materials [244, 527]. 

A 30-min 99/1->93/7 chloroform/ethanol gradient was used with a silica column (A = 254nm) to characterize styrene/methyl and ethyl methacrylate copolymers [755]. That the ethanol content was critical was shown through a series of chromatograms for a 50/50 styrene/methyl methacrylate co-polymer and a 35/65 styrene/ethyl methacrylate co-polymer. For 25 pL injections of 0.1% w/v samples, the 50/50 co-polymer completely eluted with a 97/3 chloroform/ethanol mobile phase but was completely adsorbed to the silica at 99/1. Similarly, the 35/65 copolymer eluted at 95/5 chloroform/ethanol and did not elute at 98/2. Temperature effects (40-70°C) on the level of ethanol needed for elution were tabulated for these co-polymers as well. 

F. Vlacil and I. Vins, Modified hydroxy-ethyl methacrylate copolymers as sorbents for ion chromatography,/. Chromatogr., 391, 133.1987... 

Synthesis. Polyampholytes are most readily prepared by the direct statistical copolymerization of anionic and cationic monomers typically in aqueous media, via conventional free radical pol3unerization. Examples of such materials were first reported in the 1950s (240-244). Using this approach a wide range of copolymers and terpolymers, often with a neutral hydrophilic monomer such as acrylamide, have been reported. For example, early reports of statistical polyampholytes include the methacrylic acid-stat-2-(dimethylamino)ethyl methacrylate copolymers (245), from IZ and 2Z with 6Z and the iV,A(-diethylallylamine-stat-acrylic acid copolymers from IZ and 6Z (246). More recently, synthesis and properties of novel polyampholytic terpol5uners have been described (247-250). For example, the aqueous solution properties of novel ampholytic terpolymers of acrylamide, sodium 3-acrylamido-3-methylbutanoate 5Z and 3-(acrylamidopropyl)trimethylammonium chloride 8Z have been studied in detail (187). 

A number of studies have uncovered instances of miscibility in mixtures of homopolymer A with copolymer CD when the corresponding homopolymer pairs A/C, A/D, and C/D are immiscible. The copolymer of styrene and acrylonitrile has been found to be miscible with a fairly large number of polymers, including poly(vinyl chloride) poly(e-caprolactone) sulfone based polymers poly(methyl methacrylate) and poIy(ethyl methacrylate) Copolymers of a-methylstyrene... 

Arc-MWNT methyl-ethyl methacrylate copolymer (MEMA) 0.71 2.34 1 272 348... 

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