Synthesis,Characterization and Application of Cationic Polyacrylamide P(AM-DAC)

Cationic polyacrylamide [P(AM-DAC)] was synthesized by aqueous copolymerization of acrylamide(AM)and acryloyloxyethyltrimethyl ammonium chloride(DAC)as monomer,potassium persulfate as initiator.Effects of such factors as monomer ratio,total concentration of monomers,initiator amount and copolymerization temperature on main characteristics of CPAM in the process of co-reaction were investigated.Under the optimal reaction conditions as copolymerization temperature 70 ℃,initiator amount 0.16%,total concentration of monomers 20%,monomer ratio 1: 8,and reaction time 3 h,intrinsic viscosity of the product was 18.692 4 dL/g.When the product was used in the treatment of sewage with dosage 0.003%,the transmittance of supernatant was 90.7%,and dewatering rate of the sludge was 89.2%.Chemical structure and thermal behavior of CPAM were also characterized by FT-IR and TG respectively.