Degradation of poly(ethylene terephthalate) waste with dimethyl tin distanoxane as a catalyst

Authors

  • E. Villafuerte Báez,

    1. Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Químicas, Av. Universidad S/N Ciudad Universitaria San Nicolás de los Garza Nuevo León, CP, México
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  • M. G. Sánchez Anguiano,

    Corresponding author
    • Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Químicas, Av. Universidad S/N Ciudad Universitaria San Nicolás de los Garza Nuevo León, CP, México
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  • V. M. Jiménez Pérez,

    1. Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Químicas, Av. Universidad S/N Ciudad Universitaria San Nicolás de los Garza Nuevo León, CP, México
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  • N. A. Pérez Rodríguez,

    1. Universidad Autónoma de Nuevo León, UANL, Facultad de Ciencias Químicas, Av. Universidad S/N Ciudad Universitaria San Nicolás de los Garza Nuevo León, CP, México
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  • S. Vázquez Rodríguez

    1. Universidad Autónoma de Nuevo León
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Correspondence to: M. G. Sánchez Anguiano (E-mail: magsa73@yahoo.com.mx)

ABSTRACT

In this article, we report the degradation of poly(ethylene terephthalate) (PET), which occurs through glycolysis in the presence of dimethyl tin distanoxane [(CH3)2Sn(OCOCH3)2] as a catalyst, triethylene glycol (TEG) as a nucleophilic agent, and decaline like a solvent. A number of experiments were executed, which were derived from a factorial experimental design, in which the reaction time was between 40 and 60 min, the amount of TEG was between 3.4 and 5.6 g, and the amount of catalyst was between 0.04 and 0.06% in ratio to PET. The reaction temperature was constant at 175°C in all of the experiments. Once the glycolytic depolymerization occurred, oligomers with a molecular weight around 6000 g/mol were obtained. These oligomers were analyzed through gel permeation chromatography, differential scanning calorimetry, Fourier transform infrared spectroscopy, and 1H-NMR. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3482–3488, 2013

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