Synthesis and NMR characterization of aliphatic-aromatic copolyesters by reaction of poly(ethylene terephthalate) post-consumer and poly(ethylene adipate)

An aliphatic-aromatic copolyester of poly(ethylene terephthalate), PET, and poly(ethylene adipate), PEA, PET-co-PEA, was synthesized by the high temperature melt reaction of post-consumer PET and PEA. As observed by NMR spectroscopy, the reaction yielded random copolyesters in a few minutes through...

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Bibliographic Details
Published in:Química Nova 2005-03, Vol.28 (2), p.188-191
Main Authors: Baldissera, Alessandra F., Valério, Carlos E. S., Basso, Nara. R. de S., Guaragna, Fernando, Einloft, Sandra, Tessier, Martine, Fradet, Alain
Format: Article
Language:English
Subjects:
aliphatic-aromatic copolyesters
chemical recycling
CHEMISTRY, MULTIDISCIPLINARY
polyethylene terephthalate
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Summary:An aliphatic-aromatic copolyester of poly(ethylene terephthalate), PET, and poly(ethylene adipate), PEA, PET-co-PEA, was synthesized by the high temperature melt reaction of post-consumer PET and PEA. As observed by NMR spectroscopy, the reaction yielded random copolyesters in a few minutes through ester-interchange reactions, even without added catalyst. The copolyesters obtained in the presence of a catalyst presented higher intrinsic viscosity than that obtained without the addition of catalyst, due to simultaneous polycondensation and ester-interchange reactions. The structure of the aliphatic-aromatic copolyesters obtained in different PET/PEA ratio is random as observed by NMR analysis.
ISSN:0100-4042
1678-7064
1678-7064
DOI:10.1590/S0100-40422005000200004