Abstract
Various copper-based catalyst systems and reaction conditions were studied in the graft copolymerization of N,N-dimethylacrylamide (DMAam) with a cellulose-based macroinitiator by controlled radical polymerization. The cellulose macroinitiator with degree of substitution DS = 0.44 was synthesized from dissolving softwood pulp in a LiCl/DMAc solution. The graft copolymerizations of DMAam, using the cellulose macroinitiator and various copper-based catalyst systems, were then carried out in DMSO solutions. The copolymerization kinetics was followed by 1H NMR. Water-soluble cellulose-g-PDMAam copolymers were comprehensively characterized by ATR-FTIR and 1H NMR spectroscopies and SEC analyses. DLS and steady-shear viscosity measurements revealed that when the DPgraft of the cellulose-g-PDMAam copolymer is high enough, the copolymer forms a more compact structure in water. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012
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