抄録
Aromatic polyesters were synthesized by the polymerization of bio‐based 2,5‐furandicarboxylic acid (FDCA) with petroleum‐based 1,3‐ and 1,4‐diacetoxybenzene (DAB) from the viewpoint of the suppression of the petroleum consumption to develop the sustainable development society. Polyesters prepared at the molar ratio of 1,4‐DAB in DAB (χ) of less than 60 mol％ showed meltability under decomposition temperature. When the value of χ was 20‐60 mol％, the polyesters exhibited optical anisotropicity in melt phase, suggesting the thermotropic liquid crystallinity. The phase transition temperature of these polyesters depended on the composition and it was tunable by the χ value. The film of the polyesters prepared at χ of 20 mol％ possessed 1.2 GPa of the modulus, 26.0 MPa and 2.9％ of the strength and elongation at break, respectively. Polyesters based on FDCA possessed good thermal stability and mechanical properties comparable to common aromatic polyesters.
