Figures (11)  Tables (0)

    • Figure 1. 

      SEM image of BDM degradation: (a)–(f) PBAT; (g)–(l) PLA.

    • Figure 2. 

      Weight loss of (a) PBAT and (b) PLA. Water contact angle of (c) PBAT and (d) PLA.

    • Figure 3. 

      TG and DTG curves of BDM: (a) TG and (b)DTG curves of PBAT; (c) TG and (d) DTG curves of PLA.

    • Figure 4. 

      ATR-FTIR spectra of (a) PBAT and (b) PLA in KL; carbonyl index of (c) PBAT and (d) PLA.

    • Figure 5. 

      (a), (b) XPS full spectrum of BDM. (c) O/C of PBAT and PLA.

    • Figure 6. 

      High-resolution XPS spectroscopy regional spectra for C 1s and O 1s of (a), (b) PBAT, and (c), (d) PLA, in KL.

    • Figure 7. 

      XRD patterns of (a) PBAT, (b) PLA, and Raman spectra of (c) PBAT and (d) PLA of BDM (blue D band: 1,300 cm–1, orange G band: 1,580 cm–1, yellow C=O functional group band: 1,724 cm–1).

    • Figure 8. 

      Synchronous and asynchronous correlation maps of PBAT and PLA constructed based on ATR-FTIR spectra at different time intervals. (PBAT: a, e, i) and (PLA: c, g, k): synchronous maps; (PBAT: b, f, j) and (PLA: d, h, l): asynchronous maps under KL, MMT, and W-UV conditions.

    • Figure 9. 

      (a) Principal component analysis (PCA) of BDM. (b) Pie chart showing the weights of each index. (c) The composite aging index.

    • Figure 10. 

      (a) UV-DRS, (b) band gap, (c) EIS spectra, and (d) Mott–Schottky curves of KL and MMT.

    • Figure 11. 

      Photodegradation pathways and products of (a) PLA and (b) PBAT.