Polycondensation catalyzed by polyvinyl pyrrolidone-supported metal complexes

Some polyvinyl pyrrolidone-metal complexes (abbreviated as PVP-M) have been prepared by the reaction of polyvinyl pyrrolidone with metal acetate, and have been characterized by its performance toward the polycondensation of g lutaric acid and glycols to produce polyester oligomers under mild conditio ns. The molecular weight of the oligomers was influenced by the type of met al, the molar ratio of two metals (M-1/M-2), the molar ratio of the ligand atom to metal (N/M) in the complex, and the kind of glycol used in the reac tion. (C) 1999 John Wiley & Sons, Ltd.