摘要
The graft copolymerization of N,N-dimethylacrylamide onto alginate by free radical polymerization using potassium peroxymonosulphate-sarbose as a redox pair in an inert atmosphere was investigated. The reaction conditions for maximum grafting have been optimized by varying the reaction variables, including the concentration of N,N-dimethylacrylamide （7 × 10-2 mol/L to 23 × 10-2 mol/L）, potassium peroxymonosulphate （2 × 10-3 mol/L to 18 × 10-3 mol/L）, sarbose （0.4 × 10-3 mol/L to 3.4 × 10-3 mol/L）, sulphuric acid （1 × 10-3 mol/L to 8 × 10-3 mol/L） and alginic acid （0.4 g/L to 1.8 g/L） along with time duration （60 min to 180 min） and temperature （25℃ to 45℃）. Water swelling capacity, metal ion sorption and flocculation studies of the synthesized graft copolymer have been performed. The graft copolymer has been characterized by FTIR spectroscopy and thermogravimetric analysis.
The graft copolymerization of N,N-dimethylacrylamide onto alginate by free radical polymerization using potassium peroxymonosulphate-sarbose as a redox pair in an inert atmosphere was investigated. The reaction conditions for maximum grafting have been optimized by varying the reaction variables, including the concentration of N,N-dimethylacrylamide （7 × 10-2 mol/L to 23 × 10-2 mol/L）, potassium peroxymonosulphate （2 × 10-3 mol/L to 18 × 10-3 mol/L）, sarbose （0.4 × 10-3 mol/L to 3.4 × 10-3 mol/L）, sulphuric acid （1 × 10-3 mol/L to 8 × 10-3 mol/L） and alginic acid （0.4 g/L to 1.8 g/L） along with time duration （60 min to 180 min） and temperature （25℃ to 45℃）. Water swelling capacity, metal ion sorption and flocculation studies of the synthesized graft copolymer have been performed. The graft copolymer has been characterized by FTIR spectroscopy and thermogravimetric analysis.
