The manganese carbonyl induced cationic reversible addition–fragmentation chain transfer (C-RAFT) polymerization under mild conditions such as visible light, room temperature and even in the presence of small quantities of water is reported. In this method, halide abstraction reaction between organic halide and manganese carbonyl is used to generate the oxidant and initiate radicals. The C-RAFT agents are generated in situ from radical transfer reactions between vinyl ethers and three traditional RAFT agents including xanthate, trithiocarbonate and dithiocarbamate species. Poly(vinyl ether)s with RAFT agent terminated chain ends have been successfully obtained and used as macroRAFT agents for preparation of block copolymers combining RAFT radical polymerization. Poly(isobutyl vinyl ether)-b-poly(vinyl acetate) and poly(isobutyl vinyl ether)-b-poly(methyl acrylate) are successfully prepared. In addition, poly(butyl acrylate)-b-poly(isobutyl vinyl ether) have also been obtained using poly(butyl acrylate) prepared by RAFT radical polymerization as macroRAFT agent. Our results show that poly(vinyl ether)s with controlled molecular weight and narrow molecular weight distribution (<1.2) can be obtained when using dithiocarbamate.

中文翻译：

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可见光下羰基锰诱导的阳离子可逆加成-断裂链转移（C-RAFT）聚合

据报道，羰基锰诱导的阳离子可逆加成-断裂链转移（C-RAFT）聚合反应在温和条件下进行，例如可见光，室温，甚至在少量水的存在下。在这种方法中，有机卤化物和羰基锰之间的卤化物抽象反应用于生成氧化剂并引发自由基。C-RAFT试剂是由乙烯基醚与三种传统的RAFT试剂（包括黄原酸酯，三硫代碳酸酯和二硫代氨基甲酸酯）之间的自由基转移反应原位生成的。已经成功获得了带有RAFT剂末端链端的聚乙烯醚，并将其用作用于结合RAFT自由基聚合反应制备嵌段共聚物的大分子RAFT剂。聚（异丁基乙烯基醚）-b成功制备了-聚乙酸乙烯酯和聚（异丁基乙烯基醚）-b-聚丙烯酸甲酯。另外，使用通过RAFT自由基聚合制备的聚（丙烯酸丁酯）作为macroRAFT剂，也已经获得了聚（丙烯酸丁酯）-b-聚（异丁基乙烯基醚）。我们的结果表明，使用二硫代氨基甲酸酯可制得分子量可控且分子量分布窄（<1.2）的聚乙烯醚。