A dual‐concurrent atom transfer radical polymerization/reversible addition‐fragmentation chain‐transfer (ATRP/RAFT) system is used to control a radical polymerization by electrochemical reduction of small amount of copper complexes in the presence of a chain transfer agent (CTA). Electrochemical ATRP conditions provide a continuous supply of radicals, while the CTA aids the control over molecular weight and dispersity of poly(n‐butyl acrylate), even in the presence of low ppm amounts of catalyst. The polymerization could be turned “on” and “off” by shifting electrolysis potential. With as low as 10 ppm of Cu catalyst, addition of only 2% CTA (with respect to the ATRP initiator) improves control by decreasing dispersity from Ð = 1.41 to Ð = 1.25.

中文翻译：

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低铜负载下电化学ATRP与RAFT的聚合协同作用

双并发原子转移自由基聚合/可逆加成-断裂链转移（ATRP / RAFT）系统用于在链转移剂（CTA）存在下通过电化学还原少量铜络合物来控制自由基聚合。电化学ATRP条件可提供连续的自由基，而CTA甚至在低ppm的催化剂存在下也有助于控制聚丙烯酸正丁酯的分子量和分散性。可以通过改变电解电位来“打开”和“关闭”聚合反应。在低至10 ppm的Cu催化剂的情况下，仅添加2％的CTA（相对于ATRP引发剂）可通过将分散度从η = 1.41降低至η = 1.25来改善控制。