Glycollic acid-based polyester elastomer and preparation method thereof

The invention provides a glycollic acid-based polyester elastomer and a preparation method thereof. The glycollic acid-based polyester elastomer is prepared from the following raw materials: glycollic acid, dihydric alcohol, binary acid, a stabilizer and a catalyst, the preparation method comprises the following steps: under the protection of protective gas, mixing glycollic acid, dihydric alcohol, dibasic acid and a stabilizer according to the dosage, and carrying out esterification reaction; and adding a catalyst, and carrying out pre-polycondensation and final polycondensation to obtain the glycollic acid-based polyester elastomer, the technical problem that a polyglycolic acid material is high in brittleness and poor in compatibility with a polyester elastomer, so that the toughening effect is poor is solved, the structure still contains unsaturated double bonds after polymerization, the subsequent processability of the unsaturated double bonds is reserved, and the prepared glycolic acid-based polyester e