【摘要】 以高价铈盐(硝酸铈铵)和多羟基有机物(丙三醇、季戊四醇、蔗糖)组成的氧化还原引发体系为引发剂引发丙烯酰胺(AM)自由基聚合,采用1H-NMR和SEC方法对产物进行结构表征。结果表明,制备的聚丙烯酰胺(PAM)是星形聚丙烯酰胺(SPAM),并提出了由NMR和SEC谱图计算SPAM平均臂数的两种方法。同时实验还考察了引发剂组成和用量、还原剂种类,以及单体浓度对聚合反应的影响。更多还原

【Abstract】 Acrylamide polymerization was conducted using Ce⁴⁺ and multi-hydroxyl reducer（such as 1,2,3-propanetriol, pentaerythritol and sucrose） as initiator systems. Polyacrylamide synthesized were characterized by （）¹H-NMR and SEC, and star-structure was displayed. Meanwhiles two methods were proposed to estimate the average arm number of SPAM according to the results of （）¹H-NMR and SEC. The effects of reducer type, dosage and component of initiator and concentration of monomer on polymerization were investigated.更多还原