| A kind of cationic polymer was synthesized by aqueous solution polymerization by assistance of photo-initiation using acrylamide(AM) and acryloyloxyethyl trimethylammonium chloride(DAC) as monomer. The structure of obtained product was characterized by FT-IR.The influences of the factors such as monomer concentration, reaction time, the mass of chelator, the distance from reactant to lamp-house, the mass of solubilizing agent and branching agent on the intrinsic viscosity of product were examined. The results showed that with increasing of monomer concentration, the intrinsic viscosity of product increased at first and then decreased; with increasing of chelator concentration and stabilizer concentration, there was no obvious improvement on the intrinsic viscosity of product, but the stability of product was improved due to using stabilizer; with increasing of solubilizing agent concentration, the intrinsic viscosity of product increased at first and then decreased, however the dissolving time of product decreaseed gradually.The obtained optimum reaction conditions for synthesis of P(AM-DAC) were monomer concentration 40%, cationic degree 50%, EDTA-2Na concentration 30ppm, stabilizer concentration 40ppm, solubilizing agent concentration 1.5g, sodium formal dehyde sulfoxylate concentration 10ppm,(NH4)2S2O8 concentration 10ppm, azo-compound concentration 30ppm, branching agent concentration 30ppm, PH 4.0, initiating temperature 15℃, the distance from reactant to lamp-house 11.5cm, reaction time 22min, drying temperature 60℃, drying time 5h.Under above conditions, the intrinsic viscosity of obtained product was 15.10dL·g-1. |
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