Cellulose- g-PDMAam copolymers by controlled radical polymerization in homogeneous medium and their aqueous solution properties

Abstract

Water-soluble cellulose- graft-PDMAam copolymers were prepared by single-electron-transfer living radical polymerization (SET-LRP). Cellulose based macroinitiator for SET-LRP with a degree of substitution DS ≈ 2 was synthesized from softwood dissolving pulp in a homogeneous LiCl/DMAc solution. The macroinitiator was then grafted using N, N-dimethyl acrylamide (DMAam) in DMSO. Formation of cellulose- g-DMAam copolymers were confirmed by ATR–FTIR, 1H and 13C NMR spectroscopy and SEC analyses. Light scattering and steady–shear viscosity measurements revealed that the studied chain length of grafts (DP graft) had only minor effects on the solution properties of cellulose- g-PDMAam copolymers. SLS studies suggested a loose, solvent-draining architecture of the cellulose- g-PDMAam copolymer particles in H 2O.