Otro
Characterization of Post-Consumer PET after Removal of the Original Surface: Influence of Raw Material
Registro en:
International Journal of Polymeric Materials. Oslo: Taylor & Francis As, v. 59, n. 6, p. 407-423, 2010.
0091-4037
10.1080/00914030903538538
WOS:000277459100003
0000-0002-4287-1969
Autor
Mancini, Sandro Donnini
Nogueira, Alex Rodrigues
Saide Schwartzman, Jonas Age
Kagohara, Dennis Akira
Resumen
Post-consumer cooking oil and soft drink PET bottles (PEToil and PETsoft drink) were ground and washed only with water (conventional washing). The polymer was then chemically washed (10min in an aqueous solution of sodium hydroxide 5mol center dot L-1 at 90 degrees C) and rinsed. The materials before and after chemical washing were characterized by intrinsic viscosity, differential scanning calorimetry, thermogravimetry, elemental analysis, scanning electron microscopy with X-ray spectrum microanalysis, and gas chromatography coupled to mass spectrometry. The results indicated that conventionally washed PEToil is the material that most differs among the four tested ones, and that the other three are more similar to each other and to what is expected for pure PET. For example, the composition of PEToil washed only in water contained 30 volatile organic compounds, 5 nonvolatile compounds, and 7 metals, while PETsoft drink washed conventionally and chemically contained 5 volatile organic compounds and no metal or nonvolatile organic compounds. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)