| abstract |
The present invention relates to the production of poly (alkylene carbonates) by alternating copolymerization of carbon dioxide and epoxide. Specifically, using a metal trivalent compound prepared from a Salen-type ligand containing a quaternary ammonium salt as a catalyst, in the presence of a polymer compound having a hydroxy or carboxylic acid functional group, an epoxide compound and carbon dioxide To a block or graft copolymer of the polymer compound and a poly (alkylene carbonate), and to a block or graft copolymer produced by the method. |