Additionally, based on 1 H NMR spectra and integrals of signals corresponding to CH3 protons arising from DLD (6H), CH2 protons arising from α,ω-ALD diols (4H), and CH2-OH protons arising from α,ω-ALD end-groups, number averaged molecular weight (Mn) of copolyesters were calculated following the method described in our previous work and presented in Table . Herein, the calculated values differ from those obtained on the SEC basis, however, we are still observing the same trend that Mn values increase with an increasing number of carbon atoms within α,ω-ALD. In order to evaluate the effects of diol chain length on the crystalline structure of furan-based copolyesters, X-ray diffraction (XRD) analysis was conducted on 100 µm-thick melt-pressed polymer films. Performed studies revealed that furan-based copolyesters are semicrystalline materials. As shown in Figure and Table respectively. In the case of PDF-DLF and PDDF-DLF intensity of peaks that appeared at region 17.20