Synthesis and NMR characterization of aliphatic-aromatic copolyesters by reaction of poly(ethylene terephthalate) post-consumer and poly(ethylene adipate)
AUTOR(ES)
Baldissera, Alessandra F., Valério, Carlos E. S., Basso, Nara. R. de S., Guaragna, Fernando, Einloft, Sandra, Tessier, Martine, Fradet, Alain
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2005-03
RESUMO
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.
Documentos Relacionados
- Effect of polystyrene on poly(ethylene terephthalate) crystallization
- Biodegradation of Aliphatic-Aromatic Copolyesters by Thermomonospora fusca and Other Thermophilic Compost Isolates
- Post-consumer polyethylene terephthalate and polyamide 66 blends and corresponding short glass fiber reinforced composites
- Development and characterization of post-consumer rubber tire powder, high density polyethylene and ethylene-octene-1copolymer ternary mixtures
- Estudos da reação de despolimerização do poli(tereftalato de etileno), PET, pós-consumo em meio alcalino anidro : parâmetros cinéticos e termodinâmicos