| 초록 |
One of the most promising areas of CO2 utilization is its application as a direct material for polymer synthesis because CO2 is inexpensive, neither flammable nor toxic, and no solvent is needed. Double metal cyanide complexes (DMC) are well-known catalysts for epoxide polymerization. In this study, the exploitation of new nano-sized double metal cyanide by using polyethylene glycol (PEG), polypropylene glycol (PPG), polytetramethylene ether glycol (PTMEG), EO-PO-EO block copolymer (P123), and hyperbranched polyglycidol (HBP) as co-complexing agents is investigated for the copolymerizations of CO2 and epoxides. The influence of operating temperature on the yield, carbonate content, molecular weight is discussed. The resultant copolymers are subjected to 1H NMR spectroscopy, infrared spectroscopy and gel permeation chromatography analyses. When PTMEG and HBP were used as co-complexing agent, the carbonate content was dramatically improved to 63 and 62.5%, respectively. |
