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首页> 外文期刊>RSC Advances >Facile and universal photo-induced living radical polymerization system mediated by iniferter agent and copper(II) acetate at ambient temperature
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Facile and universal photo-induced living radical polymerization system mediated by iniferter agent and copper(II) acetate at ambient temperature

机译：引发剂和乙酸铜（II）在环境温度下介导的简便，通用的光诱导活性自由基聚合体系

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摘要

A facile and universal photo-induced living radical polymerization system suitable for various types of monomers, such as oil-soluble methyl methacrylate (MMA), n-butyl acrylate (n-BA) and styrene (St) as well as water-soluble poly(ethylene glycol) monomethyl ether methacrylate (PEGMA) and 2-(dimethylamino)ethyl methacrylate (DMAEMA), was successfully developed with iniferter agent 1-cyano-1-methylethyl diethyldithiocarbamate (MANDC) and organic catalyst copper(II) acetate (Cu(OAc)(2)) under UV irradiation at ambient temperature. The polymerization kinetics with different molar ratios ([MMA](0)/[MANDC](0)/[Cu(OAc)(2)](0) = 500/1/x (x = 0.1 (200 ppm), 0.01 (20 ppm), 0.0025 (5 ppm))) indicated that the novel polymerization system showed typical "living"/controlled radical polymerization features, indicated by a linear increase of molecular weights with monomer conversion while keeping relatively narrow molecular weight distributions (M-w/M-n = 1.19-1.45) for the resultant polymers. Even when the amount of Cu(OAc)(2) was minimized to only 1 ppm level, the polymerization system still showed living character. The living features of the obtained polymers were further confirmed by a successful chain-extension experiment. In addition, a possible polymerization mechanism was discussed in this work.
机译：一种适用于各种类型单体的简便且通用的光引发活性自由基聚合体系，例如油溶性甲基丙烯酸甲酯（MMA），丙烯酸正丁酯（n-BA）和苯乙烯（St）以及水溶性聚苯乙烯（N-甲基）乙二醇单甲醚甲基丙烯酸酯（PEGMA）和甲基丙烯酸2-（二甲氨基）乙酯（DMAEMA），是由引发剂1-氰基-1-甲基乙基二乙基二硫代氨基甲酸酯（MANDC）和有机催化剂乙酸铜（II） OAc）（2））在室温下进行紫外线照射。不同摩尔比（[MMA]（0）/ [MANDC]（0）/ [Cu（OAc）（2）]（0）= 500/1 / x（x = 0.1（200 ppm），0.01）的聚合动力学（20 ppm），0.0025（5 ppm）））表示该新型聚合体系显示出典型的“活性” /受控自由基聚合特征，表现为分子量随单体转化率线性增加，同时保持相对较窄的分子量分布（Mw /所得聚合物的Mn ＝ 1.19-1.45）。即使将Cu（OAc）（2）的量最小化至仅1 ppm的水平，聚合体系仍显示出活性。通过成功的扩链实验进一步证实了所得聚合物的活性特征。另外，在这项工作中讨论了可能的聚合机理。

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