N,N,N′N′-四甲基乙二胺/CuBr_2为催化体系的反向原子转移自由基聚合研究  

Reverse Atom Transfer Radical Polymerizations Using N,N,N′,N′-Teramethylethylendiamin /CuBr_2 as the Catalyst

作　　者：潘凯[1] 江龙[1] 张娟[1] 淡宜[1] 

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所,四川成都610065

出　　处：《四川大学学报（工程科学版）》2007年第1期104-107,共4页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(20374036);四川省应用基础研究资助项目(No.03JY029-054-1);长江学者和创新团队发展计划资助项目

摘　　要：以偶氮二异丁睛(AIBN)为引发剂,N,N,N,′N′-四甲基乙二胺(TMEDA)/CuB r2为催化剂,二甲苯为溶剂,分别进行了甲基丙烯酸甲酯(MMA)和丙烯酸丁酯(BA)的反向原子转移自由基聚合(RATRP)。聚合转化率和聚合物分子量及分子量分布测定结果表明,在非极性溶剂二甲苯中MMA的聚合,聚合物的数均分子量随转化率变化的线性关系较好,分子量分布较窄,聚合可控性较好;而BA的聚合可控性较差。此外,还对MMA最终聚合产物进行了1H-NMR分析,结果表明该反应属于RATRP反应机理,所得产物为无规立构结构。Abstract：The reverse atom transfer radical polymerizations of methyl methacrylate （MMA） and butyl acrylate （BA） were carried out at 80℃ using N, N, N＇, N＇ -teramethylethylendiamin （TMEDA）/CuBr2 as the catalyst, AIBN as initiator, and xylene as solvent. GPC results and monomer conversion showed that the polymerization of MMA represents well controlled, the number-average molecular weight increases linearly with monomer conversion and during the whole polymerization, the polydispersities are low, however the polymerization of BA is uncontrolled. The resultant PMMA obtained from TMEDA/CuBr2 system was characterized by ^1H- NMR spectroscopy, and the result showed that the polymerization kinetic is RATRP, and thepolymer is random structure.

关 键 词：反向原子转移自由基聚合 N N N' N’-四甲基乙二胺 可控聚合 

分 类 号：TQ316.32[化学工程—高聚物工业]