Poly(ethylene 2,5-furandicarboxylate-mb-poly(tetramethylene glycol)) multiblock copolymers: From high tough thermoplastics to elastomers

摘要: Abstract Poly(ethylene 2,5-furandicarboxylate) (PEF) is a biobased polyester with superior thermo-mechanical and gas barrier properties than poly(ethylene terephthalate) (PET), the most widely used petroleum-based polyester. However, PEF more brittle PET. To toughen PEF, series of P(EF-mb-PTMG) (PETF) multiblock copolymers high intrinsic viscosity were successfully synthesized via melt polycondensation in presence poly(tetramethylene glycol) (PTMG) oligomer diols, characterized FTIR, 1H NMR, DSC, WAXD, TGA SEM, assessed tensile impact testing. The PTMG contributes to promote growth depress etherification discoloration side reactions. flexible segments show chain length dependent partial miscibility hard segments, its also plasticizes promotes cold crystallization segments. With tuning content, performance PEF-based materials can be tailor-made from tough thermoplastics excellent ductility toughness thermoplastic elastomers strength. Particularly, PET1KF-20 shows (elongation at break 252%) while retaining modulus (3.0 GPa) yielding strength (74 MPa), PET1KF-35 first material over 50 kJ/m2 date.