WACKER-Chair of Macromolecular Chemistry, Catalysis Research Center, Department of Chemistry, Technical University of Munich, 85748 Garching, Germany.
ACS Macro Lett. 2022 Sep 20;11(9):1067-1072. doi: 10.1021/acsmacrolett.2c00468. Epub 2022 Aug 17.
The synthesis of well-defined block copolymers from one-pot monomer mixtures is particularly challenging when monomers are from the same class and show similar reactivity. Herein, an indium-based catalyst that shows comparable rates in the ring-opening homopolymerization of -butyrolactone (-BL) and -decalactone (-DL), demonstrates monomer-selective behavior in one-pot copolymerizations of -BL and -DL. This provides simple and rapid access to well-defined di-, tri-, or tetra-block copolyesters from monomer mixtures. The sequence-controlled nature of these polymers was confirmed by kinetic analysis, C{H} NMR spectroscopy, DSC, and TGA measurements.
当单体属于同一类且反应性相同时，从一锅单体混合物中合成具有明确嵌段结构的嵌段共聚物尤其具有挑战性。在此，一种基于铟的催化剂在 - 丁内酯（-BL）和 - 癸内酯（-DL）的开环均聚合中表现出相当的速率，在 -BL 和 -DL 的一锅共聚中表现出单体选择性。这为从单体混合物中获得具有明确结构的二、三或四嵌段聚酯提供了简单、快速的方法。通过动力学分析、C{H} NMR 光谱、DSC 和 TGA 测量证实了这些聚合物的序列可控性质。
