| abstract |
This invention discloses the biodegradable polyester composition whose weight content of the cyclic esterification product which has a structure shown to a formula (I) is 100 ppm -950 ppm with respect to the total weight of a biodegradable polyester composition. In the present invention, the cyclic esterification product is added to the composition, and the content of the cyclic esterification product in the composition is controlled to be in the range of 100 ppm to 950 ppm, thereby greatly improving the heat oxidation aging resistance of the biodegradable polyester composition. An improved and blow molded film or injection molded product has less surface deposits and good surface appearance after being boiled for 240 h at 40 ° C. with 95% ethanol. |