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Effect of the catalyst MCM-41 on the kinetic of the thermal decomposition of poly(ethylene terephthalate)

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Abstract

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 °C, under nitrogen atmosphere, with heating rates of 5, 10 and 25 °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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Acknowledgements

Funding from Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq) and Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) is gratefully acknowledged.

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Authors and Affiliations

  1. Department of Chemistry, State University of Southwest of Bahia (UESB), Jequie, BA, 45206-190, Brazil

    Sulene A. Araújo

  2. Department of Chemistry, Federal University of Rio Grande do Norte, Natal, RN, 59078-970, Brazil

    Antonio S. Araujo, Nedja S. Fernandes & Valter J. Fernandes Jr.

  3. Institute of Chemistry, UNESP, CP 355, Araraquara, SP, 14801-970, Brazil

    Massao Ionashiro

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  1. Sulene A. Araújo
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  2. Antonio S. Araujo
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  3. Nedja S. Fernandes
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  4. Valter J. Fernandes Jr.
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  5. Massao Ionashiro
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Correspondence to Sulene A. Araújo or Antonio S. Araujo.

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Araújo, S.A., Araujo, A.S., Fernandes, N.S. et al. Effect of the catalyst MCM-41 on the kinetic of the thermal decomposition of poly(ethylene terephthalate). J Therm Anal Calorim 99, 465–469 (2010). https://doi.org/10.1007/s10973-009-0490-9

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  • DOI: https://doi.org/10.1007/s10973-009-0490-9

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