Synthesis and It′s effect of Aqueous Two-Phase Copolymerization System of AM and DMMC

Aqueous two-phase copolymerization of acrylamide (AM) and dimethylaminoethyl methacrylate methyl chloride(DMMC) was carried out in polyethylene glycol 20000 (PEG) aqueous solution and with 2,2′-azobis(2-amidinopropane) dihydrochloride (V-50) as the initiator and poly(dimethylaminoethyl methacrylate methyl chloride)(PDMC) as the stabilizer. The particle size and size distribution were determined by laser particle size analyzer. The effects of the concentrations of the DMMC, the PDMC and the PEG on the viscosity of the cationic polyacrylamide (CPAM) aqueous two-phase copolymerization system and the relative molecular weight of the copolymer were investigated. The results indicate that the CPAM aqueous two-phase copolymerization can avoid the Wessenberg effect in the dispersion polymerization and react smoothly and successfully. The reaction conditions for obtaining the stable aqueous two-phase copolymerization system are as follows: w(DMMC)=8%～15%(monomer)、w(PEG)=15%～25% and w(PDMC)=0.5%～1.0%.