【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。更多还原

【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.更多还原