利用聚丙烯酰胺的霍夫曼降级重排反应制备了六种聚乙烯胺盐酸盐,并对它们的水溶液性质进行了研究.聚乙烯胺盐酸盐水溶液的pH值随平均聚合度的变化并不明显,随着胺化度由55.65%升高到82.36%,其水溶液的pH值由3.96降低到2.67,聚乙烯胺盐酸盐的m值由3.65提高到5.50,pKa值由8.33降低到7.37;随着聚乙烯胺盐酸盐的平均聚合度由82.3增加到201.8,它的m值从5.13升高到5.58而pKa值则由7.48降低到了7.26;当聚乙烯胺盐酸盐的浓度小于5 g/L时,溶液的比浓粘度急剧增加.
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