Bio-based poly(butylene 2,5-furandicarboxylate-co-cyclohexanedicarboxylate) from 2,5-furandicarboxylic acid (FDCA): the effect of 1,4-cyclohexanedicarboxylic acid (CHDA)
摘要
Poly(butylene 2,5-furandicarboxylate) (PBF) is a typical semi-aromatic polyester derived from biomass, synthesized from 2,5-furandicarboxylic acid (FDCA) and 1,4-butanediol (BDO). PBF exhibits excellent mechanical strength and thermal stability, making it a promising eco-friendly alternative to petroleum-based plastics. In this study, trans-1,4-cyclohexanedicarboxylic acid (CHDA) was introduced to modulate the structure and properties of PBF. A series of poly(butylene 2,5-furandicarboxylate-co-cyclohexanedicarboxylate) (PBFC) random copolyesters were successfully synthesized via two-step melt polymerization. The results show that PBFC random copolyesters possess high thermal stability. More importantly, the crystallization behavior, crystal structure, and micromorphology of PBFC can be systematically tuned by varying the CHDA content. Notably, PBFC can realize the transformation from crystalline polyester to amorphous polyester by adjusting the content of CHDA. This tunable crystallinity endows PBFC with a wide range of mechanical properties, from rigid plastics to elastomers, making them suitable for diverse applications such as rigid packaging, flexible packaging, and high-performance bio-based elastomers.
Graphical abstract