Synthesis of Polyether and Polycarbonate Polyols Using Double Metal Cyanide Catalysts
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초록
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Carbon dioxide represents an important source of carbon for fuels and chemical feedstock in the future, thus CO2 conversion and utilization play an important role in green and sustainable chemistry. Here in, functional polycarbonate polyols have been synthesized by copolymerization of CO2 with various epoxides using double metal cyanide catalysts. The polycarbonate properties are monitored by varying conditions like CO2 pressure, reaction temperature, and amount of initiator. The catalyst morphology was investigated by X-ray powder diffraction and scanning electronic microscopy. The catalysts show relatively high activities for both ring-opening polymerization and copolymerization reactions, produce polyether polyols with low unsaturation level (0.004–0.010 meq g-1) and narrow polydispersity (1.10–1.16), and polycarbonate polyols with high carbonate content (up to 50%) and certain hydroxy functionality.