Abstract：Bycombining aqueous two-phase and reversible addition-fragmentation chain transfer (RAFT) polymerizations, a new method of acrylamide polymerization was proposed, in which polyacrylamide was synthesized in polyethylene glycol aqueous solution via RAFT polymerization and the polymerization rate, molecular weight and its distribution of the final products were studied. It was found that high concentration of initiator and monomer and high temperature could raise the initial polymerization rate and the final conversion of monomer, while the polymerization rate and the final conversion decreased with the increase of concentration of PEG and RAFT reagent. The peak polymerization rate increased with the increase of the concentration of initiator and monomer and the temperature of the polymerization system, meanwhile the time corresponding to the peak polymerization became shorter. The increase of concentration of RAFT reagent could postpone the time corresponding to the peak polymerization rate but narrower molecular weight distribution of the final product could be obtained. The increase of PEG concentration could broaden the molecular weight distribution of the final product.
