Radical terpolymerization of acrylamide, acrylic acid and N-(1,1-dimethyl-3-oxobutyl) acrylamide

The synthesis of terpolymers from acrylamide (AM, monomer 1), acrylic acid (AA, monomer 2) and N-(1,1-dimethyl 3-oxobutyl) acrylamide (DAAM, monomer 3) has been carried out in a water solution, at 30 degrees C using K2S2O4 as an initiator. The characterization of terpolymers has been obtained through H-1 NMR, microanalysis and gel permeation chromatography. Radical copolymerization of AM/AA, AM/DAAM and AA/DAAM were carried out in the same way as the terpolymerization described. The reactivity ratios for those couples have been assessed and are respectively r(12) = 0.63; r(21) = 1.43; r(13) = 1.07; r(31) = 0.54; r(23) = 1.46; r(32) = 9.32. Those values enable to foresee the monomer compositions into terpolymers. The composition range allowing to obtain polymers both soluble in waterand organic solvents has been identified. (C) 1998 Elsevier Science Ltd. All rights reserved.