Highly transparent films of new copolyesters derived from terephthalic and 2,4-furandicarboxylic acids

Abstract

Transparent films of poly(ethylene terephthalate)-co-(ethylene 2,4-furandicarboxylate)s (PET-co-2,4-PEFs) were developed here for the first time, exploring the ability of 2,4-FDCA to impart excellent optical properties to the polymers thereof.

Tuning the Properties of Furandicarboxylic Acid-Based Polyesters with Copolymerization: A Review

“…PEFT20 copolymer films synthesized from DMFD and dimethyl terephthalate, with catalyst Sb 2 O 3 and temperature up to 270 °C were transparent both before and after annealing ( Figure 22 a), in contrast with PET film, which became opaque after annealing [ 40 ]. Unlike 2,5-PEF, 2,4-PEF homopolyester and PET- co -2,4-PEF (10/90–(50/50) copolyesters synthesized from DMFD with catalyst titanium(IV) isopropoxide and at temperature up to 210 °C were transparent ( Figure 22 b), which was because of their amorphous nature [ 44 ]. PBF- co -PBbF copolymers exhibited both excellent transmittance and UV absorption values because of their conjugated bifuran moieties [ 63 ].…”

“…PEF- co -PET copolymers could be used to replace PEI- co -PET copolymers in packaging applications, since they could give transparent films with improved barrier properties [ 40 , 44 , 129 ]. The approach of copolymerizing PEF with PET is also an alternative method of improving the barrier properties of PET with using a biobased copolymer, instead of the usual polyamide.…”

“… Images of films of various FDCA-based copolymers: ( a ) PEFT20 [ 40 ], ( b ) 2,4-PEF and PET- co -2,4-PEF [ 44 ], ( c ) PBF90Bf10 [ 63 ], ( d ) PPF- co -PPCH 90 [ 61 ], ( e ) PEF, PEF- co -PCBDOF copolymers [ 35 ], ( f ) PCDHDMF and PEF- co -PCDHDMF- co -PCBDOF copolymers [ 36 ]. …”

“…Repeating Units (Abbrev.) Structure Reference poly(ethylene 2,5-furan dicarboxylate-co-ethylene terephthalate) (PEF-co-PET) PEF PET [38][39][40][41][42][43][44] poly(ethylene 2,5-furan dicarboxylate-co-hexamethylene 2,5-furandicarboxylate) (PEF-co-PHF)…”

Sustainable aromatic polyesters with 1,5-disubstituted indole units

“…[22][23][24][25][26][27][28][29][30][31] Among these building blocks, furan-based ones have attracted the most attention. [32][33][34][35][36][37][38][39] Particularly, 2,5-furan-dicarboxylic acid (FDCA) has been conveniently produced from sugar resources and used to synthesize various polyesters. [40][41][42][43][44][45][46] For example, polyethylene furanoate (PEF) is a fully biobased polyester, which can be prepared using FDCA and bio-based ethylene glycol.…”