.30% Cationic Degree Of Pda Polymerization Process Is A Preliminary Study

Preparation conditions of poly(Dimethyldiallylammonium Chloride-Acrylamide) with cationicity of 30% were studied in this paper. Using redox complex of ammonium peroxysulfate-sodium bisulfite or ammonium peroxysulfate as an initiator, the effects of processing conditions such as the temperature of polymerization, concentration of monomers, initiator and Na₄EDTA on the intrinsic viscosity of product PDA with cationicity of 30% were investigated respectively. Through a series of preliminary experiments and orthonormal experiments, the intrinsic viscosities of the PDA products under the initiators of ammonium peroxysulfate-sodium bisulfite and ammonium peroxysulfate reached 7.54 dL·g^-1 and 8.59 dL·g^-1, the percent of residual double bond were 29.76% and 22.17% respectively. When monomer concentration was 42.0%, polymerization reaction temperature was 25℃, initiator mass was 3.5mL and when monomer concentration was 40.0%, polymerization reaction temperature was 45℃, initiator mass was 2.0mL, Na₄EDTA mass was 0.90mL, the better processing conditions were gained under ammonium peroxysulfate-sodium bisulfite initiator systems and ammonium peroxysulfate initior systems respectively.