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在添加一定浓度的CuX(X=C l/B r)/五甲基二亚乙基三胺(PMDETA)后,甲基丙烯酸N,N-二甲氨基乙酯(DMAEMA)于室温下只需暴露于空气中即可聚合形成PDMAEMA.通过一系列对比试验验证了该过程的催化氧化聚合特征,通过改变催化剂浓度与反应温度等反应条件,利用气相色谱、核磁共振和凝胶渗透色谱研究了该聚合过程的动力学和所得PDMAEMA的结构.结果表明,单体转化率与所得聚合物分子量均随反应时间的延长而逐渐增加,过高或者过低浓度的CuX/PMDETA均无法催化该聚合过程,所得聚合物具有与普通线型PDMAEMA类似的化学结构.我们提出了一个假设性的机理以解释此现象.
After adding a certain concentration of CuX (X = Cl / Br) / pentamethyldiethylenetriamine (PMDETA), N, N-dimethylaminoethylmethacrylate (DMAEMA) PDMAEMA can be polymerized by exposure to air, and the catalytic oxidative polymerization of this process has been verified by a series of comparative experiments. The effects of reaction conditions such as catalyst concentration and reaction temperature on the catalytic performance of PDMAEMA were investigated by gas chromatography, 1H NMR and gel permeation chromatography The kinetics of the polymerization process and the structure of the obtained PDMAEMA were studied.The results showed that both the monomer conversion and the molecular weight of the obtained polymer increased with the extension of the reaction time.The CuX / PMDETA solution, either too high or too low, The resulting polymer has a similar chemical structure as the general linear PDMAEMA.We propose a hypothetical mechanism to explain this phenomenon.