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Synthesis of Poly(ethylene terephthalate)‐ block ‐Poly(tetramethylene oxide) Copolymer by Direct Polyesterification of Reactive Oligomers
Author(s) -
SaintLoup René,
Robin JeanJacques,
Boutevin Bernard
Publication year - 2003
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200390072
Subject(s) - thermoplastic elastomer , polymer chemistry , copolymer , ethylene oxide , ether , differential scanning calorimetry , gel permeation chromatography , materials science , size exclusion chromatography , oligomer , thermoplastic , diphenyl ether , elastomer , condensation polymer , chemistry , polymer , organic chemistry , thermodynamics , enzyme , physics
The object of this study was the synthesis of thermoplastic elastomer compounds by direct copolyesterification of reactive oligomers of poly(ethylene terephthalate) (PET) and of poly(tetramethylene oxide) (PTMO). PET was glycolysed to synthesise hydroxytelechelic oligomers of PET. Commercially available hydroxytelechelic PTMO was modified to synthesise carboxytelechelic oligomers. The chemical structures of these oligomers were investigated by 1 H NMR and size exclusion chromatography. Multiblock poly(ester‐ether) was then obtained by polyesterification of the hydroxytelechelic and carboxytelechelic oligomers, using different catalysts and different reaction conditions. The best stoichiometric ratio was determined to lead to the highest M n . The chemical structure of the synthesised poly(ester‐ether) was investigated by size exclusion chromatography and 1 H NMR. The thermal and thermomechanical behaviour of the synthesised poly(ester‐ether) was investigated by differential scanning calorimetry and by dynamic mechanical analysis, and showed a thermoplastic elastomer behaviour. This product could also be an interesting way of chemically recycling PET waste.Polyesterification of hydroxytelechelic PET with carboxytelechelic PTMO.