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在 0～ 1 0 0℃温度范围内 ,由原子转移自由基聚合方法 ,采用助催化和非助催化体系 ,引发甲基丙烯酸甲酯聚合 ,利用 1 3 C NMR测定聚甲基丙烯酸甲酯的等规度 .发现原子转移自由基聚合仍以间同立构为主 ,随着聚合温度的升高间同立构等规度降低 ,与通常自由基聚合对有规立构控制特征相似 .助催化剂异丙醇铝和活性端羰基配位 ,对聚合物的立构规整性有一定的影响 .
At 0 ~ 1 0 0 ℃ temperature range, by atom transfer radical polymerization method, the use of cocatalytic and non-catalytic system, initiating polymerization of methyl methacrylate, using 1 3 C NMR determination of polymethyl methacrylate It is found that the atom transfer radical polymerization is still dominated by syndiotacticity, and the syndiotactic equivalence decreases with the increase of the polymerization temperature, which is similar to the conventional stereoselective control of free radical polymerization. Aluminum isopropoxide and active carbonyl carbonyl, the stereospecificity of the polymer have a certain impact.