Technological watch

The present invention relates to: a biodegradable polyester resin prepared by adding a reaction rate control agent and a molecular weight increasing agent which are derived from biomass; and a method for preparing same and, more specifically, to a biodegradable polyester resin and a method for preparing same, in which, to obtain a biodegradable polyester resin having a reaction rate, flexibility and tensile strength which are superior to those of polybutylene-co-adipate terephthalate, which is a conventional biodegradable polyester resin, polyglycerol succinate having a number average molecular weight of 500-1,000, prepared by synthesis through an esterification reaction between glycerol and succinic acid, is added as a reaction rate control agent derived from biomass to increase the reaction rate in the synthesis of a biodegradable polyester resin, and polyglycerol furanoate having a number average molecular weight of 1,000-5,000, prepared by synthesis through an esterification reaction between glycerol and 2,5-furandicarboxylic acid, is added as a molecular weight increasing agent derived from biomass to increase tensile strength, to thereby prepare a biodegradable polyester resin having a number average molecular weight of 70,000 or more, a weight average molecular weight of 150,000 or more, an acid value of 0.4-0.8 mg-KOH/g, and a tensile strength of 400 kgf/cm2 or more.