| 초록 |
Double metal cyanide (DMC) catalysts are well-known heterogeneous catalysts for the ring-opening polymerization (ROP) of epoxides. Considering the preparation conditions have a great influence on the catalytic behavior of DMC catalyst in the ROP of propylene oxide, we have investigated different catalyst preparation parameters such as precipitation temperature, type and amount of CAs, and relative ratio of the metal components. The catalysts were characterized by Fourier transform infrared, X-ray photoelectron spectroscopy, elemental analysis, X-ray powder diffraction and scanning electron microscope. The PO consumptions acquired by different catalysts were plotted versus reaction time to evaluate their catalytic activity. The resultant polyols have moderate molecular weight (Mn = 4400‒5000 g mol‒1), narrow polydispersity index and low unsaturation level. |
