Abstract: The linear equation of controllable synthesis of poly (acrylamide-co-vinylamine)with low amino groups at low NaOH dosage was established. The influence factors, such as NaClO dosage, NaOH dosage, reaction time and temperature were investigated respectively. The results indicated that when the content of amino groups of poly(acrylamide-co-vinylamine)was below 50%, NaOH dosage was only as three times as that of polyacrylamide. The linear equation between NaClO dosage and content of amino groups of the product was also verified by elementary analysis. The results of GPC analysis showed that the average number molecular weight and PDI of the obtained poly(acrylamide-co-vinylamine)were approximate 1000—1800 and 1.6—2.0, respectively. This obtained linear equation would provide reaction conditions for the controllable synthesis of poly(acrylamide-co-vinylamine )with low amino groups.

Key words: poly(acrylamide-co-vinylamine), low content of amino groups, reaction condition, linear equation, low NaOH dosage

摘要： 建立了低碱用量下低氨基含量聚丙烯酰胺-co-乙烯胺的可控合成线性关系式。通过研究反应中次氯酸钠、氢氧化钠用量，降解反应时间和温度等因素，可知合成氨基含量小于50%的聚丙烯酰胺-co-乙烯胺化合物时，碱用量为聚丙烯酰胺物质的量的3倍即可，次氯酸钠用量与产物氨基含量有近似线性关系，应用元素分析对该线性关系进行了确认。降解产物聚丙烯酰胺-co-乙烯胺化合物的相对分子质量范围为1000～1800，PDI 在1.6～2.0之间。该线性关系式的建立为控制合成低氨基含量聚丙烯酰胺-co-乙烯胺提供了反应条件的设计依据。

关键词: 聚丙烯酰胺-co-乙烯胺, 低氨基含量, 反应条件, 线性关系式, 低碱用量