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-NMR谱图的羰基峰,得到以MMA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.
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