低分子量聚乙烯胺的合成及其分子量测定  

Synthesis and Determination of Molecular Weight of Polyvinylamine with Low Molecular Weight

作　　者：杨晶晶[1] 刘子慧[1] 侯婷婷[1] 

机构地区：[1]南京市新型功能材料重点实验室南京晓庄学院化学系

出　　处：《合成材料老化与应用》2016年第4期11-15,共5页Synthetic Materials Aging and Application

基　　金：国家自然科学青年基金项目(21506102);江苏省高校自然科学基金面上项目(14KJD150007);江苏省大学生创新训练计划项目(201411460026Y,201511460028Y)

摘　　要：以N-乙烯甲酰胺为单体,异丙醇为溶剂和链转移剂,通过AIBN引发自由基聚合反应制备了聚（N-乙烯甲酰胺）,并将聚（N-乙烯甲酰胺）在碱性条件下,80℃水解6h,成功制备了分子量在10000以下的低分子量聚乙烯胺。通过红外、~1H-NMR表征了产物结构。通过GPC测定了聚乙烯胺的分子量。研究了引发剂用量对聚乙烯胺分子量的影响,结果表明,通过调控单体与引发的配比从100∶1增加到100∶10时,聚乙烯胺的数均分子量从8028g/mol降低至5355g/mol。Poly（ N-vinylformamide） was synthesized via free radical polymerization of N-vinylformamide in 2-propanol with AIBN as the initiator. Then,polyvinylamine with molecular weight below 10000 was obtained from the alkali hydrolysis of poly（ N-vinylformamide） at 80℃ for 6h. The structure of the product was characterized by FTIR and^1H-NMR spectrum. The molecular weight of the polyvinylamine was determined by GPC. The effect of the initiator dosage on the molecular weight of the polyvinylamine was investigated,and the result exhibited that the number molecular weight of polyvinylamine can be decreased from 8028 g/mol to 5355 g/mol by controlling the molar ratio of monomer to initiator from 100∶ 1 to 100∶ 10.

关 键 词：低分子量 聚乙烯胺 自由基聚合 N-乙烯甲酰胺 

分 类 号：TQ316.3[化学工程—高聚物工业]