离子液体中纤维素-甲基丙烯酸羟乙酯的均相聚合  

Homogeneous Polymerization of Cellulose-2-hydroxyethyl Methacrylate in an Ionic Liquid

作　　者：肖舒[1] 曹辉波[1] 戴林[1] 申越[1] 何静[1] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083

出　　处：《精细化工》2012年第7期712-716,共5页Fine Chemicals

基　　金：国家"973"计划项目(973-2010CB732204)~~

摘　　要：在离子液体介质中利用原子转移自由基聚合方法合成了纤维素-甲基丙烯酸羟乙酯的接枝共聚物,采用甲基丙烯酸羟乙酯单体合成纤维素聚合物,并对聚合物进行结构测定与性质分析。通过FTIR、1HNMR和GPC对聚合物结构及相对分子质量(简称分子量,下同)进行分析,研究了不同溶剂对聚合条件、接枝效率的影响,以及在不同溶剂中聚合物的结构、分子量分布、热稳定性及形态有何变化。结果表明,在溶剂N,N-二甲基甲酰胺(DMF)中进行的反应聚合速率及终止速率均高于在丁酮中进行的反应。纤维素接枝甲基丙烯酸羟乙酯聚合物分子量分布约为1.81,该聚合物热稳定性较强;在DMF中呈球状颗粒,平均直径50 nm;在选择性溶剂丙酮中颗粒直径100 nm左右。With the increasing demand for more efficient utilization of cellulose, the modification of cellulose by graft polymerization provides a significant route to combining the advantages of natural and synthetic macromoleeules for a wide range of potential applications. The synthesis of cellulose-graft- PHEMA copolymer via homogeneous atom transfer radical polymerization （ATRP） in the ionic liquid was researched in this article. FHR, ^1HNMR and GPC different solvents on the polymerization conditions, graftin thermal stability and the indicate that the grafting were carried out to analyze the effects of g efficiency, molecular weight distribution, changes in shape in different solvents of the copolymer as well. The results efficiency increased with the increase copolymer cellulose-graft-PHEMA showed good thermal stability, into spherical particles with a diameter of 50 nm in DMF and a solvent acetone. of reaction time. The obtained graft and the copolymer could aggregate diameter of 100 nm in the selective

关 键 词：纤维素 离子液体 ATRP 均相聚合 丙烯酸系列化学品 

分 类 号：TQ314[化学工程—高聚物工业] TQ342