Synthesis of multibranch polycarbonate polyols via ring-opening copolymerization of CO<sub>2 </sub>and epoxides
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The CO2 fixation with epoxides has been considered as an environmentally friendly and economic approach for polycarbonate and cyclic carbonate synthesis, in views of resource utilization and carbon management. Herein, a series of polycarbonate polyols of tunable degree of branching (0–0.6), remarkable carbonate contents (20.5–64.2%), molecular weights of 1100–16000 g mol−1, and Ð values of 1.0–2.4 were synthesized via ring-opening copolymerization of CO2 and various epoxides such as propylene oxide, cyclohexene oxide, and glycidol. Furthermore, scale-ups of the DMC-catalyzed synthesis of GC and PCs were straightforward by simply modifying the ratio of monomer to catalyst, suggesting more potential for industrial purpose. The as-prepared PCs in this study can serve as the potential precursors in the polyurethane industry and as the alternative conventional polyols.