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采用响应曲面优化法(Response surface methodology)以丙烯酰胺(AM)和二甲基二烯丙基氯化铵(DMDAAC)为共聚单体,通过自由基聚合对聚丙烯酰胺类共聚物(PDA)进行制备研究。探讨了3个主要因子单体摩尔比、聚合体系p H、引发剂用量的最佳水平及各自变量间的交互作用对PDA得率的影响,通过该法设计得到了最佳优化条件:单体摩尔比n(AM)∶n(DMDAAC)=2.5∶1,聚合体系p H6.00,引发剂用量为单体总质量的1.00%。在模型提供的最优水平下PDA得率89.807%,与预测值91.6944%相吻合,表明所选模型准确、可靠。该方法为聚丙烯酰胺类共聚物的合成及应用提供了依据。
The polyacrylamide copolymer (PDA) was prepared by free radical polymerization using acrylamide (AM) and dimethyldiallylammonium chloride (DMDAAC) as the reaction monomers by Response surface methodology Preparation study. The effects of the molar ratio of three main factors, the optimum pH of the polymerization system, the optimal amount of initiator and the interaction between the variables on the yield of PDA were discussed. The optimum conditions were obtained by the method: monomer The molar ratio of n (AM): n (DMDAAC) = 2.5: 1, the polymerization system p H6.00, the amount of initiator 1.00% of the total monomer. At the optimum level provided by the model, the yield of PDA was 89.807%, which was consistent with the predicted value of 91.6944%, indicating that the selected model was accurate and reliable. The method provided the basis for the synthesis and application of polyacrylamide copolymer.