Polymethacrylic Acid, PMAA

A wide range of polyacrylic acids (PAAs), polymethacrylic acids (PMAAs), polyacrylamides (PAMs), their salts and homo-, co-, and terpolymer derivatives are available from a great many manufacturers around the world today. Polyacrylates especially are a backbone of BW chemical formulations and are manufactured with an almost infinite variety of average molecular weights (MWs), MW distributions, activity strengths, and other characteristics. 

The structures of polyacrylic acid (PAA) and polymethacrylic acid (PMAA) are shown in Figure 5.2. 

The method described here was used for determination of conformational state and distance between polymer chain ends of various spin-marked polymers. poly-4-vinylpyridine (PVP ), polymethacrylic acid (PMAA ), sodium salt of polymethacrylic acid (PMAA -Na), styrene and maleic anhydride copolymer (STMAL ) [9, 10, 13] (formulas of spin-marked macromolecules are presented in Scheme 1 molecular masses of polymers and used solvents are presented in Table 1). 

In one example polymer segment density profiles of weak polyacid brushes consisting of polymethacrylic acid (PMAA) chains were investigated as a function of the pH of the environment by means of multiple-angle ellipsom-etry [68]. The polymer brushes were prepared by surface-initiated polymerization of methylacrylic acid as described above. 

Fig. 6. Normalized reduced specific viscosities as a function of pH Polymethacrylic acid (PMAA open squares), polydimethylaminoethyl methacrylate (PDMAEMA open triangles) and a polyampholye containing mole fractions of 26% MAA, 30% DMAEMA, and 44% HEMA (open circles)...

It is notable that at high pH the gel starts to collapse once more. This is due to charge screening by the Na ion involved in adjusting the pH inducing further coiling. At low pH, the polymethacrylic acid (PMAA) chains form highly compact hydrophobic clusters, which are joined by short extended polymer chains. As the pH is increased the size of the clusters decreases up to a limit,... 

The nature of the complexes formed by the interactions between polyacrylic acid (PAA) and polymethacrylic acid (PMAA) with poly(4-vinylpyridine) and poly(2-vinylpyridine) in ethanol/water solution was studied using FTIR spectroscopy. The PMAA complexes involved hydrogen-bonding interactions, while there was evidence of ionic interactions in the PAA complexes. This difference in the behaviour between the complexes is attributed to the higher acidity of PAA compared with that of PMAA (140). 

Slightly polydisperse polymethacrylic acid (PMAA) samples were also used in this study. The PMAA sample had molecular weight, M , of 2 x 105 g/mol and a polydispersity index, of 1.40. Methacrylic acid used was purchased from... 

In spite of the efficacy of exogenous interferon, the major search has been for Interferon inducers. Synthetic polymers have been effective inducers and some of the characteristics apparently necessary for activity are as follows a large molecule with a high density of free anionic groups, not readily degradable and not readily eliminated. Agents with these characteristics include polymers of maleic anhydrides, polyacrylates and carboxylates. Polyacrylic acid (PAA) and polymethacrylic acid (PMAA) have induced Interferon in tissue culture and protected mice infected with Mengo virus and vaccinia and vesicular stomatitis viruses,76. Salts of polyvinyl sulfate appear to have dual activity since they induce interferon activity in mice but not in tissue culture, and the antiviral activity exerted is not correlated with virus interferon sensitivity. ... 

PMA. See Polymaleic acid Propylene glycol methyl ether acetate PMAA. See Polymethacrylic acid PMAA, sodium salt. See Sodium polymethacrylate PM acetate. See Propylene glycol methyl ether acetate PMDT. See N,N, N",N"-Pentamethyldiethylenetriamine PMM PMMA. See Polymethyl methacrylate PnB. See Butoxypropanol PO-dimsthylsiloxane-PO block copolymer CAS 161755-53-9... 

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