Department of Chemistry, Carnegie Mellon University , 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States.
J Am Chem Soc. 2015 Feb 4;137(4):1428-31. doi: 10.1021/ja512519j. Epub 2015 Jan 27.
Elemental silver was used as a reducing agent in the atom transfer radical polymerization (ATRP) of acrylates. Silver wire, in conjunction with a CuBr(2)/TPMA catalyst, enabled the controlled, rapid preparation of polyacrylates with dispersity values down to Đ = 1.03. The silver wire in these reactions was reused several times in sequential reactions without a decline in performance, and the amount of copper catalyst used was reduced to 10 ppm without a large decrease in control. A poly(n-butyl acrylate)-block-poly(tert-butyl acrylate) diblock copolymer was synthesized with a molecular weight of 91 400 and Đ = 1.04, demonstrating good retention of chain-end functionality and a high degree of livingness in this ATRP system.
元素银被用作丙烯酸酯原子转移自由基聚合（ATRP）的还原剂。银丝与 CuBr(2)/TPMA 催化剂一起，可快速控制制备分散度值低至 Đ = 1.03 的聚丙烯酸酯。在这些反应中，银丝可在连续反应中重复使用数次，而不会降低性能，并且催化剂铜的用量减少到 10 ppm 而不会严重降低控制效果。合成了分子量为 91400 和 Đ = 1.04 的聚（正丁基丙烯酸酯）-嵌段-聚（叔丁基丙烯酸酯）两嵌段共聚物，证明了在该 ATRP 体系中链末端官能团具有良好的保留性和高的活性。
