Abstract A novel amphoteric polyacrylamide (PDAA) was prepared by inverse emulsion polymerization. The influence of its cationic degree and molecular weight on retention property was discussed. Then, the chemical structure and micromorphology of the obtained PDAA were characterized by Fourier infrared spectrum (FTIR), NMR hydrogen spectrum (1H NMR), gel permeation chromatography (GPC), and scanning electron microscope (SEM). Finally, the synergistic retention effects of polydimethyldiallylammonium chloride (PDADMAC), cationic starch (CS), cationic guar gum (CHPG), cationic chitosan (CTS), and polyamine (PA) on the novel PDAA were investigated. The results showed that the optimum cationic degree and molecular weight of PDAA were 25% and 4 million, respectively. The chemical structure of PDAA was confirmed by FTIR, 1H NMR, and GPC. SEM showed that the particle size of PDAA was between 150 and 600 nm, and the particles were very stable because no broken particles were found. In addition, most of the five cationic polymers have good synergistic retention effect on PDAA, and the order of synergistic effect was PDAA/PDADMAC > PDAA/CTS > PDAA/CS > PDAA/CHPG > PDAA/PA.

中文翻译：

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新型两性聚丙烯酰胺的制备及其与阳离子聚合物的协同留着

摘要 采用反相乳液聚合法制备了新型两性聚丙烯酰胺（PDAA）。讨论了其阳离子度和分子量对保留性能的影响。然后，通过傅里叶红外光谱（FTIR）、核磁共振氢谱（1H NMR）、凝胶渗透色谱（GPC）和扫描电子显微镜（SEM）对所得PDAA的化学结构和微观形貌进行表征。最后，研究了聚二甲基二烯丙基氯化铵 (PDADMAC)、阳离子淀粉 (CS)、阳离子瓜尔胶 (CHPG)、阳离子壳聚糖 (CTS) 和多胺 (PA) 对新型 PDAA 的协同保留作用。结果表明，PDAA的最佳阳离子度和分子量分别为25%和400万。PDAA 的化学结构经 FTIR、1H NMR 和 GPC 证实。SEM显示PDAA的粒径在150-600nm之间，颗粒非常稳定，因为没有发现破碎的颗粒。此外，5种阳离子聚合物中大部分对PDAA具有良好的协同保留作用，协同作用顺序为PDAA/PDADMAC>PDAA/CTS>PDAA/CS>PDAA/CHPG>PDAA/PA。