Kinetic of thermal degradation of low-density and high-density polyethylene by non-isothermal thermogravimetry

Study of the decomposition kinetics is an important tool for the development of polymer recycling in industrial scale. In this work, parameters such as activation energy, frequency factor and reaction order, were measured under dynamic conditions. Flynn Wall-Ozawa, Van Krevelen, Horowitz-Metzger, Co...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2005-01, Vol.79 (2), p.393-399
Main Authors: Sinfrônio, F. S. M., Santos, J. C. O., Pereira, L. G., Souza, A. G., Conceiçăo, M. M., Fernandes Jr, V. J., Fonseca, V. M.
Format: Article
Language:English
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Summary:Study of the decomposition kinetics is an important tool for the development of polymer recycling in industrial scale. In this work, parameters such as activation energy, frequency factor and reaction order, were measured under dynamic conditions. Flynn Wall-Ozawa, Van Krevelen, Horowitz-Metzger, Coats-Redfern, Madhusudanan and Vyazovkin methods were used to determine the kinetic parameters. The analysis of the results obtained by the Coats-Redfern method shows that the thermal degradation process of LDPE and HDPE corresponds to a phase boundary controlled reaction (mechanism R2). This method shows that the reaction order values of LDPE and HDPE are about 0.7 and 0.6, respectively.
ISSN:1388-6150
1572-8943
DOI:10.1007/s10973-005-0072-4