Trimethylammonioethyl methacrylate

The permeability and water uptake of Eudragit RS or RL [chemical name, poly(ethyl acrylate, methyl methacrylate, trimethylammonioethyl methacrylate chloride)], can be influenced by the presence of different counterions in the release medium.It was found that theophylline was released faster from Eudragit RS-coated pellets, when succinic, acetic, glutaric, tartaric, malic, or citric acid are present in the release medium. Increased permeability was explained by the higher hydration of the film, also expressed as the free volume. ... 

BMA butyl methacrylate, EA ethyl acrylate, DAEMA dimethylaminoethyl methacrylate, MAA methacrylic acid, MMA methyl methacrylate, TAMCl trimethylammonioethyl methacrylate chloride, VA vinyl acetate, VP vinylpyrrolidone. 

Figure 7.10 Chromatograms of cationic polymers A, glycol chitosan B, DEAE-dextran C, poly(trimethylammonioethyl methacrylate) iodide salt, obtained on TSKgel GMPW (two 600 X 7.5 mm I.D. columns) with 0.8M sodium nitrate at a flow rate of 1 mL min and 25°C [15].

Eudragit RL Poly(ethyl acrylate, methyl methacrylate, trimethylammonioethyl methacrylate chloride) - 1 2 0.2... 

A big advantage of any radical process, ATRP included, is its tolerance to many functional groups such as amido, amino, ester, ether, hydroxy, siloxy and others. All of them have been incorporated as substituents into (meth)acrylate monomers and successfully polymerized. One current exception is a Tree carboxylic acid group which potentially complexes with the catalyst and disables ATRP, and therefore, presently, it has to be protected. Recent work has shown that monomers bearing ionic substituents such as sodium 4-vinylbenzoate, sodium 4-vinylbenzylsulfonate and 2-trimethylammonioethyl methacrylate methanesulfonate and triflate, and dimethylaminoethyl methacryate can be polymerized directly [148]. 

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