二甲基二烯丙基氯化铵丙烯酰胺共聚物的合成与结构表征

Synthesis and Structural Characterization of Copolymer of Dimethyl Diallyl Ammonium Chloride and Acrylamide

考察了影响二甲基二烯丙基氯化铵(DMDAAC)与丙烯酰胺(AM)在水溶液中进行氧化还原引发共聚合得到的共聚物特性粘数[η](30℃,1mol/LNaCl水溶液)的因素:DMDAAC提纯与否;反应物pH值(1～5),单体总浓度(10%～50%);DMDAAC与AM摩尔比(0.2～1.0);引发剂K2S2O8 NaHSO3浓度(0.006%～0.5%)。共聚反应温35℃,时间10h。通过红外光谱特征吸收峰的指认,确定所合成的为DMDAAC/AM共聚物。用所合成的一个共聚物处理造纸黑液,其絮凝和脱色效果均优于絮凝剂聚丙烯酰胺工业品和聚丙烯酸。图2表2参5。

The factors influencing on the characteristic viscosity in 1 mol/L NaCl aqueous solution at 30℃ of DMDAAC/AM copolymer prepared by redox initiated copolymerization in aqueous solution are investigated: purification of monomer DMDAAC; pH value of reaction mixture (1～5); total concentration of monomers (10-50%); molar ratio of DMDAAC to AM (0.2～1.0); and concentration of initiator K2S2O8NaHSO3 (0.006-0.5%). The copolymerization is conducted at 35℃ in 10 hrs. The DMDAAC/AM copolymer structure is identified by characteristic absorption peaks in its IR spectrum. In treating a black liquor from cellulosepaper making, the flocculating and decolorating capacities of a DMDAAC/AM copolymer prepared is better than that of a commercial flocculant PAM and polyacrylic acid.