聚丙烯酰胺的羟基化反应与产物结构表征

A Study on the Synthesis of Hydroxymethylated Polyacrylamide and Its Characterization

研究了聚丙烯酰胺（ＰＡＭ）及部分水解聚丙烯酰胺（ＨＰＡＭ）与甲醛的化学反应，并对产物结构进行了表征。结果显示，ＰＡＭ与甲醛的羟甲基化反应与ＰＡＭ在溶液中分子形态有较大关系，除受反应温度、时间、ｐＨ、投料比等因素影响外，聚合物浓度、羧基含量都对羟甲基化程度有明显影响。碱性条件下ＰＡＭ羟甲基化过程中伴有酰胺基的水解反应。相同反应条件下，ＨＰＡＭ的反应程度低于ＰＡＭ的反应程度。

Poly(N-methylol acrylamide)(HMPAM) has been prepared through chemical modification of PAM.The HMPAM structure was identified by IR and 13 CNMR.Factors effecting the reaction of PAM with formaldehyde were discu{sed and the results showeed that the conformation of the macromolecule in solution has great in-fluence on the degree of substitution of PAM.The polymer was slightly hydrysised during the based-catalyed chemical modification.