| abstract |
The present invention provides a process for preparing a poly(alkylene carbonate) using a molecular weight modifier in a procedure for preparing a carbon dioxide/epoxide copolymer using a novel complex as a catalyst, the novel complex being It is synthesized by a sand-bonding ligand including a quaternary ammonium salt. According to the present invention, even if a molecular weight modifier is used, the activity of the catalyst can be stably maintained, whereby a poly(alkylene carbonate) having a low molecular weight in a desired amount can be effectively provided. Further, it is expected that since the novel complex of the present invention as a catalyst has a simple structure compared to the existing copolymerization catalyst system, the novel complex can be effectively applied to a large scale because of its economical preparation cost. Commercialization process. |