Biobased poly(ethylene-co-hexamethylene 2,5-furandicarboxylate) (PEHF) copolyesters with superior tensile properties.
writer：Xie Hongzhou; Wu Linbo; Li Bo-Geng; Dubois Philippe.
keywords：Biobased polymers, high performance polymers, polyesters, furandicarboxylic acid, mechanical properties
source：期刊
specific source：Ind Eng Chem Res. 2018, 57, 13094?13102, DOI：http://dx.doi.org/10.1021/acs.iecr.8b03204
Issue time：2018年
Poly(ethylene-co-hexamethylene 2,5-furandicarboxylate) (PEHF) copolyesters with high intrinsic viscosity were synthesized from 2,5-furandicarboxylic acid (FDCA), ethylene glycol (EG), and 1.6-hexanediol (HDO) through two-step melting polycondensation, characterized
with 1H NMR, DSC, WAXD, and TGA, and assessed by tensile and impact tests. The molar fraction of HF unit in PEHF (?HF), namely, copolymer composition, is higher than the molar fraction of HDO in the feeding diols and can be predicted empirically via Mayer?Lewis equation with apparent reactivity ratio rHDO = 4.6 and rEG = 0.74. All the PEHFs exhibited a single glass transition temperature and excellent thermal stability. HF-rich (?HF ≥ 88 mol %) PEHFs are semicrystalline but the others are almost amorphous. In comparison with PEF, PEHFs with ?HF of 28?36 mol % possess significantly improved tensile ductility (elongation at break 54?160%) and retain high tensile modulus (2.6?2.2 GPa) and yielding strength (71?65 MPa). The tensile properties are comparable to those of bottle-grade PET.