Fig. 4.

Hydrolysis of BABuTABuBA and PBAT. a Structure of the aromatic polyester mimicking oligomer BABuTABuBA. b PpEst hydrolysis of BABuTABuTA into its components TA, BuTA and BA at 50 °C after 24 and 72 h. c Structure of the aromatic-aliphatic co-polyester PBAT. d PpEst hydrolysis of milled PBAT film into its components TA and BuTA at 50, 65 or 80 °C after 24 and 72 h. e PpEst hydrolysis of whole PBAT film into its components TA and BuTA at 50, 65 or 80 °C after 24 and 72 h. Values are means of triplicates and standard deviations are shown as bars