The protocol used in the study is similar to the one proposed by Bhogle et al. For complete depolymerization, in 8 mL glass vials, 30 mg of PBPAC is added (for a final concentration of 5 mg•mL -1 ) in 6 mL of a THF:MeOH mixture (2:1 v/v). NaOH was added in catalytic quantity (3 mg). Controls were made in the absence of NaOH and MeOH. Samples were placed in a Bandelin Sonorex ultrasonic bath (35 kHz) at room temperature for 1 h. The reaction was stopped by precipitating the polymer and inactivating the base in an acid bath (HCl 0.15 %). The reaction products were purified by evaporation of the solvent using miVac Quattro (Genevac) at 50 °C until total evaporation (about 1 h). For kinetic monitoring of partial depolymerization, 30 mg of PBPAC was added to 8 mL vials (for a final concentration of 5 mg•mL -1 ) in 6 mL THF. 0.5 eq of MeOH were added (4,8 µL) and the samples were placed in a Bandelin Sonorex ultrasonic bath (35 kHz) at room temperature for 2 h. A 400 µL aliquot was withdrawn after 5 min, 15 min, 30 min, 1 h and 2 h. For each sample, the reaction was stopped by precipitating the polymer and inactivating the base in an acid bath (HCl 0.15 %). The reaction products were dried by evaporation of the solvent using miVac Quattro (Genevac) at 50 °C until total evaporation (about 1 h). The blanks are treated in the same manner and conditions as previously described. However, without the addition of methanol and NaOH, the balance of the reaction volume is completed with THF.