Modification of poly(ethylene 2,5-furandicarboxylate) with aliphatic polycarbonate diols: 1. Randomnized copolymers with significantly improved ductility and high CO2 barrier performance

摘要: Abstract Poly(ethylene 2,5-furandicarboxylate) (PEF) is a very promising biobased polymer possessing high mechanical strength, rigidity and gas barrier performance. But its poor ductility toughness may limit applications. In this study, PEF-based copolymers with intrinsic viscosity were successfully synthesized via melt polycondensation of dimethyl 2,5-furandicarboxylate (DMFD) ethylene glycol in the presence copolycarbonate diol (PPeHC diol) as produced from 1,5-pentylene (PeDO), 1,6-hexylene (HDO) carbonate, characterized 1H NMR, 13C DSC, TGA, tensile, impact testing. The products “randomnized” result ester-carbonate exchange reaction occurring along polycondensation, therefore became amorphous composition-dependent physico-mechanical properties which can be tunable rigid-to-ductile thermoplastics to thermoplastic elastomers. Particularily, φPPeHC 25 wt% 30 wt% are greatly improved (elongation at break up 194%) CO2 performance higher than poly(ethylene terephthalate) (PET; BIFCO2 3.6–2.8), retaining tensile modulus (2.2–1.9 GPa) yielding strength (69–58 MPa) comparable bottle-grade PET. comparison, copolymer 40 wt% behaves elastomer excellent well (23 MPa).