| 主权项 |
1. A method of preparing a biodegradable polyester-based polymer including:
a prepolymerization step of polymerizing a dicarboxylic acid compound (A), a diol compound (B), and a branching agent (C), which is represented by Formula 1 below, 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: wherein X is selected from the group consisting of a substituted or unsubstituted C6-C30 arylene group and a substituted or unsubstituted C2-C30 heteroarylene group, X may include at least one —COOR′, wherein R′ is selected from the group consisting of a hydrogen atom, a halogen atom, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C2-C20 alkenyl group, a substituted or unsubstituted C2-C20 alkynyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C7-C30 arylalkyl group, a substituted or unsubstituted C2-C30 heteroaryl group, and a substituted or unsubstituted C3-C30 heteroaryl akyl group, Y is selected from the group consisting of a substituted or unsubstituted C1-C30 alkylene group, a substituted or unsubstituted C1-C30 heteroalkylene group, a substituted or unsubstituted C3-C30 cycloalkylene group, a substituted or unsubstituted C3-C30 heterocylcoalkylene group, a substituted or unsubstituted C6-C30 arylene group, and a substituted or unsubstituted C2-C30 heteroarylene group, and n is 1 to 100. |
