Navegando por Autor "Brito, Venicius Leony de França"

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    Análise do tempo mínimo de cura de adesivo de poliuretano utilizado na laminação de filme de poliéster e polietileno
    (2021-11-29) Brito, Venicius Leony de França; Fonsêca, Juliana de Castro Macêdo; http://lattes.cnpq.br/8869180950884002; http://lattes.cnpq.br/6624281780568416
    A mixture of solvent-based polyurethane adhesive and ethyl acetate was prepared and applied to 12 μm polyester films with a coating machine, followed by an overlay with a 36 μm lowdensity polyethylene film of thickness. The obtained sample were conditioned in an oven at different temperatures in a humid environment, at intervals of 2, 4, 6, 8, and 24 hours. After this period, the variation of the adhesive cure as a function of temperature and time was endorsed through the analysis of Infrared spectroscopy with Fourier Transform using the Attenuated Total Reflectance technique (FIIR-ATR) with germanium crystal. Through analysis of 2270 cm-1 FTIR band. The aim of this work is to determine the shortest cure time for adhesives used in PET and PE lamination, using Fourier Transform infrared spectroscopy and Attenuated Total Reflectance technique.