The OH end-groups of oligoPBAT-diol were esterified with DNTPAA with a Mitsunobu reaction (Figure ) . In a three-necked round-bottom flask topped with a condenser, oligoPBAT-diol with an OH content of 1.6 mmol g -1 , DNTPAA (1.3 molar equivalents relative to oligoPBAT-diol's OH end-groups) and TPP (1.5 molar equivalents relative to oligoPBATdiol's OH end-groups) were dispersed (suspension) in 1,2-dichloroethane under a flow of argon. PBAT AMS=Starch 6-MHA DIAD (1.5 molar equivalents relative to oligoPBAT-diol's OH end-groups) was then added slowly at 0 °C. This suspension immediately turned into a dark yellow clear solution, which was then stirred for 24 h at room temperature under a flow of argon. The reaction mixture was then precipitated into cold methanol. The solid phase was finally filtered, washed with methanol and dried under vacuum at 50 °C for approximately 15 h. OligoPBAT-dithiol-protected was recovered as a pale-yellow powder.