| 초록 |
Double metal cyanide (DMC) catalysts are among the most effective catalysts for ring-opening polymerization of propylene oxide (PO). These catalysts are prepared by a precipitation from aqueous medium, thus, the water solubility of all catalyst components including organic complexing agent (CA) are presumed to be one of the crucial conditions. In this work, we have investigated various water-soluble novel compounds as CAs for DMC catalyst. The catalysts were characterized using structural sensitivity analysis such as FTIR and X-ray photoelectron spectroscopy. The relative content of the catalyst components was investigated by combining elemental analysis. DMC catalysts bearing novel CAs exhibited high performance towards PO polymerization with turnover frequency (calculated by mol-PO per mol-Zn per minute) up to 200 min−1, produced polyols with narrow polydispersity index, low unsaturation level and tunable hydroxyl functionality. |
