This contribution reports an efficient approach for preparing polycarbonate block terpolymers by immortal stepwise copolymerization of CO₂ with different epoxides in the presence of enol chain transfer, mediated by robust cobalt catalyst systems consisting of the fluorine substituted salenCo(III)NO₃ or biphenol-linker bimetallic Co(III) complex in conjunction with an ionic cocatalyst, PPNX (PPN = bis(triphenylphosphine)iminium, X = NO₃⁻ or 2,4-dinitrophenoxide). Various polycarbonate block terpolymers were obtained in perfectly unimodal distribution of their molecular weights with narrow polydispersity. They all possessed only one broad glass transition temperature, which could be adjusted by altering the length of different polycarbonate segments.

该贡献报告了一种有效的方法，该方法通过在坚固的钴催化剂体系（由氟取代的salenCo（III）NO ₃或双酚连接剂组成）介导的烯醇链转移存在下，将CO ₂与不同的环氧化物进行不间断的不间断共聚制备聚碳酸酯嵌段三元共聚物的有效方法。双金属的Co（III）与离子性助催化剂结合复合物，PPNX（PPN =双（三苯基膦）亚胺，X = NO ₃ ^-或2,4-二硝基苯氧基）。得到各种聚碳酸酯嵌段三元共聚物，它们的分子量具有完全单峰分布且具有窄的多分散性。它们都仅具有一个宽的玻璃化转变温度，可以通过改变不同聚碳酸酯链段的长度来调节。