Estabilidade Térmica de Embalagens de Poli (Tereftalato de Etileno (PET): Determinação de Oligômeros
Freire, Maria Teresa de A.; Reyes, Felix G. R.; Castle, Laurence
http://dx.doi.org/10.1590/S0104-14281998000100007
Polímeros: Ciência e Tecnologia, vol.8, n1, p.46-53, 1998
Resumo
Embalagens plásticas para alimentos contendo poli(tereftalato de etileno (PET) foram submetidas a diversas condições de aquecimento. Oligômeros foram identificados por cromatografia líquida de alta eficiência acoplada à espectrometria de mass?s, quantificados e usados como parâmetro de avaliação da estabilidade térmica do PET. Pequenas variações foram verificadas na distribuição dos oligômeros unicamente nas amostras aquecidas a 230°C, o que sugere estabilidade térmica do PET nas condições de aquecimento utilizadas. Os resultados obtidos indicam que o uso do polímero é adequado para utilização como material de embalagem para alimentos a serem aquecidos em fornos convencionais ou de microondas.
Palavras-chave
Polietileno terejtalato, embalagem, migração, estabilidade térmica
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