含聚氧乙烯链端的阴离子型改性聚酰胺-胺树状聚合物的合成及表征  

Synthesis and Characterization of Modified Polyoxyethylene-Terminated Anionic Polyamido-Amine Dendrimers

作　　者：彭晓春[1] 彭晓宏[2] 赵建青[2] 

机构地区：[1]吉首大学化学化工学院,湖南吉首416000 [2]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《石油化工》2009年第9期998-1003,共6页Petrochemical Technology

基　　金：湖南省自然科学基金资助项目(06JJ2067);吉首大学博士科研基金资助项目(jsdxkyzz 200701)

摘　　要：以采用发散法在优化合成条件(n(乙二胺):n(丙烯酸甲酯)=1:4、n(丙烯酸甲酯):n(树状聚合物中间体)=24:1、反应温度25℃、反应时间24 h)下合成的第四代聚酰胺-胺(G4.0 PAMAM)树状聚合物为骨架,以阴离子试剂丙烯酸钠和不同相对分子质量的聚氧乙烯大单体为端基改性剂,在以甲醇为溶剂、反应温度50℃、反应时间96 h的条件下进行三元Michael共加成反应,对G4.0 PAMAM树状聚合物分子末端基进行修饰改性;并用傅里叶变换红外光谱、核磁共振、凝胶渗透色谱和透射电子显微镜等方法对合成产物的结构进行表征。表征结果显示,合成的产物为含聚氧乙烯链端的阴离子型改性G4.0 PAMAM树状聚合物,其分子结构形态以球状为主,粒径范围10～120 nm,通常以集聚态存在。The generation 4. 0 （ G4. 0 ） anionic polyamido-amine （ PAMAM ） dendrimers were synthesized by divergence method under optimized reaction conditions： mole ratio of ethylenediamine to methyl acrylate 1 ： 4, mole ratio of methyl acrylate to intermediate of dendrimers 24 ： 1, reaction temperature 25 ℃ and reaction time 24 h. The obtained G4.0 PAMAM dendrimers were used as skeleton to prepare polyoxyethylene （PEO）-terminated PAMAM dendrimers by Michael co-addition reaction, with sodium acrylate （SAA） as anionic modifier and PEO-macromonomer with different relative molecular mass as terminal group modifier and methanol as solvent, at reaction temperature 50 ℃ for reaction time 96 h. Surface modification of G4.0 PAMAM dendrimers was accomplished by termination of PEO groups from the modifier. The composition, structure and relative molecular mass of the obtained modified dendrimers PAMAM/SAA/PEO were characterized by means of FTIR, ^1 H NMR, ^13C NMR, GPC and TEM. TEM observation showed that the PEO-terminated anionic G4.0 PAMAM dendrimers appeared in spherical form with particle size range of 10 - 120 nm, and most of the particles ordinarily stayed in aggregation.

关 键 词：聚酰胺-胺树状聚合物 丙烯酸钠 聚氧乙烯大单体 表面改性 Michael共加成反应 

分 类 号：TQ317.5[化学工程—高聚物工业]