Synthesis and characterization of new functional polyelectrolytes based oncarboxyl containing methacrylates

Three new methacrylic monomers, 6-methacryloyloxyhexanoic acid, 6-(N-methac ryloyl)aminohexanoic acid, and ethyl 6-(N-methacryloyl)- aminohexanoate, co ntaining carboxyl groups spaced from the polymerizable double bond by a pol ymethylene chain, have been synthesized. Multifunctional polymeric material s were obtained by radical polymerization of these monomers with different vinyl monomers. The type and content of the functional groups was modulated on the basis of feed composition and the nature of the functional comonome r selected among 2-hydroxyethyl methacrylate, diethyleneglycol methacrylate , methacrylic acid, vinyl acetate, N-vinyl-2-pyrrolidinone, N-isopropylacry lamide, and 2-(N,N-dimethylamino)ethyl methacrylate. The solubility, molecu lar weight, and acid-base properties exhibited polyelectrolyte behavior for all copolymers in solution.