**Table 4.** Properties of MWL and PFL.

\* DTG: first derivative of the *TGA* curve.

Table 4 also shows the S/G ratio calculated based on the volume integrals of signals S2,6 and G2, according to previously published works [28]. The value of S/G for MWL (0.63) was in accordance to that measured by Rencoret et al. [21] for *Paulownia fortunei* (0.66). The corresponding value for PFL (0.83) indicated that G-units have suffered more degradation than S-units.

Figure S2 (Supplementary Material) shows the main substructures identified in MWL and PFL of Paulownia.
