In opposition to the previous analysis, we have also characterized the complete depolymerization of PBPAC to confirm that the degradation products are only bisphenol A (BPA) and dimethyl carbonate in the case of methanolysis as performed here. For obvious reasons, the complete degradation of the polymer to CO2 will not be discussed here as our conditions will not lead to such drastic decomposition. Total degradation could then be achieved by methanolysis under conditions similar to those described by Bhogle et al. and the depolymerization results were compared with those of the monomer BPA. The release of dimethyl carbonate could not be observed as it is evaporated at the same time as the solvent during the post-treatment of our degradation sample before analysis. First SEC analysis of the resulting species is shown in Figure and when compared with that of the polymer it shows a complete disappearance of the PBPAC chain distribution, in exchange for a narrow peak at 11.04 min. This retention time is equal to the one found for the BPA monomer (Figure ), suggesting complete depolymerization in our conditions. However, under our analytical conditions, SEC is not sufficiently resolved to confirm the existence of a single species represented by this single peak, nor that it actually corresponds to BPA. In fact, BPA dimers or even trimers may exhibit the same retention time and so cannot be discriminated here. To perform this confirmation, the PBPAC methanolysis product was then analyzed by HPLC. Figure shows the chromatogram of the detected products, with a single peak observed at 6.59 min that corresponds to the BPA retention time (Figure ), and that is not present in the blank reaction where no methanolysis occurred. This is in accordance with Bhogle et al., with the two main products being effectively BPA and dimethyl carbonate. To finally confirm the structure of the BPA formed, we nonetheless analyzed the methanolysis product with FT-IR. Figure shows the spectra obtained for BPA and the reaction product. When comparing the two, it is found that the spectrum of the methanolysis product is very similar to the one of pure BPA, with the appearance of peaks between 3600-3200 cm -1 and 1600 cm -1 and the disappearance of carbonate bond peaks at 1777 cm -1 and 1194 cm -1 , confirming the total depolymerization of the polymer. In addition, the spectrum of BPA differs from that of the non-degraded polymer (Figure ) by the appearance of a broad peak at 3600-3200 cm -1 corresponding to the stretching of the hydroxyl bond of BPA and the appearance of a double peak centered around 1600 cm -1 , which can be attributed to the stretching of the alkene bonds. Figure : Infrared spectrum of the product of a complete PBPAC methanolysis in orange and pure BPA in black, obtained in transmission Following the same logic as previously outlined, 1 H NMR was used to further identify the chemical groups of the depolymerization products. The resulting spectrum is shown in Figure and compared with that of BPA (Figure ). Once again, the two spectra are very similar, with a singlet at 1.62 ppm integrating for 6 protons that is assigned to the two methyl groups of BPA. A singlet at 4.61 ppm integrating for 2 protons (located at 4.73 ppm for the reference BPA) is then assigned to the hydroxyl group protons. Finally, the doublet of doublet corresponding to the aromatic protons with a roofing effect can be observed between 6.65 and 7.15 ppm. The first doublet centered at 6.72 ppm integrates for 4 protons and is assigned to the protons in ortho of the alcohol group, while the doublet centered at 7.08 ppm is assigned to the protons in meta and also integrates for 4 protons as expected.