METHOD FOR PREPARING BIODEGRADABLE POLYESTER COPOLYMER

摘要

The present invention provides a method of preparing a polyester-based polymer and a polyester-based polymer prepared by the method. The method of preparing the polyester-based polymer includes a prepolymerization step of polymerizing a dicarboxylic acid compound (A), a diol compound (B), and an aromatic branching agent (C) at 160-220°C to produce a prepolymer; and a condensation polymerization step of performing a condensation polymerization of the prepolymer at 200-250°C, under a vacuum pressure of 0.1 to 2 Torr.