Premium
Copolyesters Containing Terephthalic and Bio‐Based Furanic Units by Melt‐Polycondensation
Author(s) -
Abid Majdi,
Kamoun Wided,
Gharbi Rachid El,
Fradet Alain
Publication year - 2008
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200700237
Subject(s) - terephthalic acid , condensation polymer , materials science , dimethyl terephthalate , monomer , thermal stability , polymer chemistry , copolyester , oligomer , amorphous solid , copolymer , diol , polymer , polyester , molar mass , organic chemistry , composite material , chemistry
5,5′‐Isopropylidene‐bis(ethyl 2‐furoate), a monomer prepared from bio‐based ethyl 2‐furoate, was reacted with dimethyl terephthalate and ethan‐1,2‐diol (ED) by melt polycondensation in order to obtain copolyesters containing both terephthalate and furoate units. The conventional two‐step method involving (i) the formation of a hydroxyethyl‐terminated oligomer by reaction of starting diester mixture with excess ED and (ii) a polycondensation step with elimination of ED was used to obtain high molar mass copolyesters. Copolymers of various compositions were synthesized and characterized by 1 H NMR, DSC, and TGA. For all compositions, the degree of randomness, determined by 1 H NMR, was close to 1, reflecting a random distribution of terephthalic and furanic ester units in polymer chains. The resulting materials are amorphous polymers ( T g = 70–80 °C) with good thermal stability.