Tear-resistant and puncture-resistant PBAT copolyester material and preparation method thereof

The invention belongs to the field of high polymer materials, and particularly relates to a tear-resistant and puncture-resistant PBAT copolyester material and a preparation method thereof. The preparation method of the copolyester material comprises the following steps: mixing adipic acid, 1, 4-butanediol, terephthalic acid, glycerol and tetrabutyl titanate according to a molar ratio, and sequentially carrying out three stages of two-step esterification and polycondensation to obtain PBAT-GL-0. 6 copolyester; then, citric acid and microcrystalline cellulose are continuously added for third-step esterification, and the tear-resistant and puncture-resistant PBAT copolyester material is obtained. According to the synthetic method provided by the invention, the puncture performance of the PBAT copolyester material added with 1wt% of MCC is improved by 111.89% compared with that of the PBAT copolyester material without adding MCC, and the tear strength is improved by 78.25%. The preparation method provided by the