Copolyesters Containing Terephthalic and Bio-Based Furanic Units by Melt-Polycondensation
✍ Scribed by Majdi Abid; Wided Kamoun; Rachid El Gharbi; Alain Fradet
- Book ID
- 102485514
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 153 KB
- Volume
- 293
- Category
- Article
- ISSN
- 1438-7492
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✦ Synopsis
Abstract
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.
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