Scheme 1. Preparation process of DMF based polyurethanes.
Figure 1. Viscosity of polyurethanes.
Figure 2. FT-IR spectra of polyurethanes.
Figure 3. DSC thermograms of polyurethane films.
Figure 4. Tan delta of polyurethane films.
Figure 5. TGA curve of polyurethane films.
Figure 6. Stress-strain curves of polyurethane films.
Figure 7. SEM micrographs of wet-type artificial leather based on nonwoven fabrics coated with DMF based polyurethanes.
Table 1. Macroglycols used in this study
Table 2. Sample designation and composition of Wet-PU containing bio polyol
Table 3. Thermal and mechanical properties of polyurethane films
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