ATRP体系下甲基丙烯酸甲酯和丙烯酸正丁酯梯度共聚物的合成与表征  

Synthesis and Characterization of Gradient Copolymers Composed of Methyl Methacrylate and Butyl Acrylate via Atom Transfer Radical Copolymerization

作　　者：许风玲[1] 柴继峰[1] 孟庆民[1] 国玉梅[1] 张以群[1] 

机构地区：[1]华东师范大学化学系,上海200062

出　　处：《高分子材料科学与工程》2007年第1期49-52,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金项目(20474018)

摘　　要：以2-溴丙酸甲酯为引发剂,溴化亚铜为催化剂,五甲基二乙基三胺为配体,进行丙烯酸正丁酯和甲基丙烯酸甲酯的原子转移自由基聚合。用单体竞聚率的差别合成梯度共聚物(rM=2.58,rB=0.25)。通过分析共聚物13C-NM R谱图的羰基峰,得到以MM A为中心和以BA为中心的三元组的相对浓度,转化得二元组浓度,用各元组浓度随转化率的变化表征梯度共聚物的梯度结构。Copolymers of methyl methacrylate （MMA） and butyl acrylate （BA） were prepared using atom transfer radical polymerization （ATRP） initiated by methyl 2-bromopropionate （BMP）, catalyzed by CuBr / N, N, N′, N″, N′″-pentamethyldiethyhnetriamine （PMDETA） in bulk. Reactivity ratios were calculated （rM=2. 58 rB=0. 25）. The triad sequences were determined by using the carbonyl resonance frequencies. The dyad concentrations in the copolymers were obtained from them. The varieties of triad and dyad concentration fraction with conversion were first introduced to characterize the gradient structures.

关 键 词：原子转移自由基聚合 梯度共聚物 丙烯酸正丁酯 甲基丙烯酸甲酯 

分 类 号：TQ316.322[化学工程—高聚物工业]