Poly methyl methacrylate-co-methacrylic

Figure 11 Schematic representation of poly (methyl methacrylate -co- methacrylic acid -co- methacrylic anhydride).

Fig. 1 Chemical structures of the polymers commonly used for preparation of beads poly (styrene-co-maleic acid) (=PS-MA) poly(methyl methacrylate-co-methacrylic acid) (=PMMA-MA) poly(acrylonitrile-co-acrylic acid) (=PAN-AA) polyvinylchloride (=PVC) polysulfone (=PSulf) ethylcellulose (=EC) cellulose acetate (=CAc) polyacrylamide (=PAAm) poly(sty-rene-Wocfc-vinylpyrrolidone) (=PS-PVP) and Organically modified silica (=Ormosil). PS-MA is commercially available as an anhydride and negative charges on the bead surface are generated during preparation of the beads...

G. Asman, O. Sanli. Ultrafiltration of Fe (III) solutions in the presence of poly(vinyl alcohol) using modified poly(methyl methacrylate-co-methacrylic acid) membranes, J. Appl. Polym. Sci. 64 (1997) 1115— 1121. 

Figure 6.31 demonstrates the validity of Equation (6.134) and Equation (6.141) via noncross-linked poly(methyl methacrylate-co-methacrylic acid) (PMMA/MAA) beads. The swollen gel thickness initially increases because the rate of erosion is slow. Then a constant gel thickness follows (i.e., synchronization of swelling rate and erosion rate) and continues until the core disappears. Afterwards, the gel thickness decreases. According to Equation (6.139), the release of peptide should be linear with time, but Figure 6.31 shows a nonlinear release profile due to the decrease of surface area of spherical geometry. 

Figure 3. NMR spectra of poly(methyl methacrylate-co-methacrylic acid) obtained by (1) plasma-initiated polymerization and (2) thermal polymerization in 0.2% deuterated pyridine.

Kato S, Noguchi J, Nomura M. Kinetics of emulsion polymerization of methyl methacrylate using poly(methyl methacrylate-co-methacrylic acid) as polymeric emulsifier. Polym Mat Sci Eng 1999 80 552—553. 

Figure 9.18 Release of oxprenolol HCl from hydrophobic polyelectrolyte beads. Controlled release of oxprenolol HCl from 1mm diameter beads of poly[(methyl methacrylate)-co-(methacrylic acid)] into phosphate-buffered water of different buffer concentration at pH 7.4 and 37 °C. Adapted from Kim and Lee, Pharmaceutical Research, 1992, 9, 1268-1274.

Poly(methyl methacylate co methyl a chlorometh acrylate (38%)) Poly(methyl methacrylate co acrylonitrile (11%)) " Poly(methyl methacrylate co indenone (50%)) Poly(methyl methacrylate co oximino 2 butanone co methacrylonitrile (15%)) Poly(methyl methacrylate co methacrylic acid (25%)) Poly(methyl methacrylate co methacrylic acid co methacrylic anhydride) IBM Terpolymer Poly(methyl methacrylate co Isobutylene (25%)) ... 

PA6 PVDF Poly (methyl methacrylate-co-methacrylic acid)... 

Semiconductor particles can also be used advantageously in coating applications to provide specific optical response to the material. As an example, Kumacheva et al. recently described the synthesis of monodisperse nanocomposite particles with inorganic CdS nanocrystals sandwiched between a PMMA core and a P(MMA-co-BA) outer copolymer shell layer. The particles are prepared by emulsion polymerization in three steps (Fig. 4.21) [144]. In a first step, polymer latexes are used as host matrices for CdS nanocrystals formation [145,146]. To do so, monodisperse poly(methyl methacrylate-co-methacrylic acid) (PMMA-PMAA) latex particles were ion-exchanged with a Cd(Cl04)2 solution. The Cd + ions thus introduced into the electrical double layer were further reduced into CdS nanoclusters by addition of a Na2S solution. The CdS-loaded nanocomposite particles were subsequently recov-... 

The pH of the transition of pH-sensitive pol5miers such as poly(methyl methacrylate-co-methacrylic acid) or poly (AT-acryloyl sulfametazine-co-Ar,Ar-dimethylacrylamide) is strictly fixed for the given composition of comonomers. Thus, a new poljuner should be synthesized for each desired pH value. The advantage of polyelectrolyte complexes is that by using only two different polymers and mixing them in different ratios, reversible precipitation can be achieved at any desired pH value in a rather broad pH range (see Polyelectrolytes). 

Biocatalysts that are reversibly soluble as a function of pH have been obtained by the covalent coupling of lysozyme to alginate (113) of trypsin to poly(acrolein-co-acrylic acid) (114) and of cellulase (115), amylase (115) a-chymotrypsin, and papain (116) to poly(methyl methacrylate-co-methacrylic acid). A reversibly soluble cofactor has been produced by the covalent binding of NAD to alginate (117). Reversibly soluble a-chymotrypsin, penicillin acylase, and alcohol dehydrogenase were produced by coupling to the polycation component of polyelectrolyte complexes formed by poly(methacrylic acid) and poly(iY-ethyl-4-vinyl-pyridinium bromide) (118). 

Saunders, B. R., Crowther, H. M., and Vincent, B. 1997. Poly[(methyl methacrylate)-co-(methacrylic acid)] microgel particles Swelling control using pH, consolvency and osmotic des welting. Macromolecules 30 482 87. 

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