Poly(butylene adipate-co-terephthalate) (PBAT) is a potentially fully biobased and biodegradable co-polyester. It is a well-known industrially compostable polyester with good mechanical behavior and higher water barrier properties compared to the other biodegradable polyesters, and particularly adequate for flexible packaging applications. For instance, PBAT is largely used in Europe, in the formulation of biodegradable packaging to replace some conventional bags in the supermarkets. This aromatic copolyester is synthetized using organometallic catalysts under vacuum and high temperature , by polycondensation between 3 building blocks such as 1,4-butanediol (BDO) and two carboxylic acids, with the adipic acid (AA) and the terephthalic acid (TA) . These building blocks can be biobased: