氨基酸希夫碱铜(Ⅱ)催化MMA原子转移自由基聚合的研究  

Atom-transfer Radical Polymerization of Methyl Methacrylate Catalyzed by Amino Acid Schiff Base Cu(Ⅱ) Complex

作　　者：翁家宝[1,2] 郑雪琳[1,2] 王晓琴[1] 孟东利[1] 黄志彬[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007 [2]福建师范大学福建省高分子材料重点实验室,福建福州350007

出　　处：《合成化学》2011年第5期582-585,共4页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金资助项目(20874012);教育部科学研究重点项目(204072);福建省自然科学基金资助项目(2010J05018);福建省教育厅重点项目(JA03023)

摘　　要：分别以L-蛋氨酸和L-组氨酸为原料,与水杨醛通过缩合反应合成了两个氨基酸水杨醛希夫碱铜(Ⅱ)配合物(1a和1b)。以1为催化剂,2-溴异丁酸乙酯为引发剂,进行甲基丙烯酸甲酯(MMA)的原子转移自由基聚合制得聚甲基丙烯酸甲酯(PMMA),其立构规整度由13C NMR测定。实验结果表明,PMMA数均分子量随MMA转化率线性增长,符合"活性"/可控聚合特征,PMMA分子量分布较窄,主要构象为间同立构。Two amino acid Schiff base Cu（ Ⅱ ） complexes（la and lb） were prepared by condensation of salicylaldehyde with L-methionine and L-histidine, respectively. Methyl methacrylate（MMA） was polymerized using I as the catalyst in ethyl 2-bromoisobutyrate initiated atom transfer radical polymerization to obtain poly（methyl methaerylate）（PMMA）. The tacticity of PMMA was characterized by 13C NMR. The results showed that the polymerization reaction exhibited the characteristics of active radical polymerization beeause PMMA molecular weight increases with the increase of MMA conversion, the polydispersity index was narrow, and the predominantly tacticity of PMMA was syndiotaetic.

关 键 词：甲基丙烯酸甲酯 “活性”/可控聚合 氨基酸席夫碱 铜(Ⅱ)配合物 原子转移自由基聚合 

分 类 号：O623.736[理学—有机化学]