Publicação: Effect of the catalyst MCM-41 on the kinetic of the thermal decomposition of poly(ethylene terephthalate)
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2010-02-01
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Springer
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The aim of this work is to determine the activation energy for the thermal decomposition of poly (ethylene terephthalate)-PET, in the presence of a MCM-41 mesoporous catalyst. This material was synthesized by the hydrothermal method, using cetyltrimethylammonium as template. The PET sample has been submitted to thermal degradation alone and in presence of MCM-41 catalyst at a concentration of 25% in mass (MCM-41/PET). The degradation process was evaluated by thermogravimetry, at temperature range from 350 to 500 degrees C, under nitrogen atmosphere, with heating rates of 5, 10 and 25 degrees C min(-1). From TG, the activation energy, determined using the Flynn-Wall kinetic method, decreased from 231 kJ mol(-1), for the pure polymer (PET), to 195 kJ mol(-1), in the presence of the material (MCM-41/PET), showing the catalyst efficiency for the polymer decomposition process.
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Journal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 99, n. 2, p. 465-469, 2010.
