期刊
QUIMICA NOVA
卷 28, 期 2, 页码 188-191出版社
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0100-40422005000200004
关键词
aliphatic-aromatic copolyesters; polyethylene terephthalate; chemical recycling
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.
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