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Thermal studies of chitin–chitosan derivatives

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Abstract

New poly(azo) amino-chitosan compounds were obtained from the azo coupling reaction of N-benzyl chitosan and diazonium salts. The thermal behavior of these compounds was studied by thermogravimetric analysis (TG), differential thermogravimetric analysis (DTG), TG coupled with a Fourier-transform infrared, and differential scanning calorimetry (DSC). TG/DTG curves of chitin–chitosan polymer showed two thermal events attributed to water loss and decomposition of the polysaccharide after cross-linking reactions. Thermal analysis of the poly(azo) amino-chitosan compounds showed that the decomposition temperatures decreased when compared to the starting chitin–chitosan and N-benzyl chitosan. DSC results showed an agreement with the TG/DTG analyses. Thermal behavior of poly(azo) amino-chitosans suggest that these compounds could be considered as potential thermal sensors.

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Acknowledgements

The authors gratefully thank Fundação de Apoio a Pesquisa do Estado de São Paulo (FAPESP), Programa de Pós-graduação em Ciência e Tecnologia de Materiais (POSMAT), and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for financial support and post-graduation fellowship.

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Authors and Affiliations

  1. Laboratório de Química Orgânica Fina, Departamento de Física, Química e Biologia, Universidade Estadual Paulista, Campus de Presidente Prudente, C.P. 467, Presidente Prudente, SP, 19060-900, Brazil

    Fernanda Stuani Pereira & Eduardo René Pérez González

  2. Laboratório de Análises Térmicas, Departamento de Física, Química e Biologia, Universidade Estadual Paulista, C.P. 467, Presidente Prudente, SP, 19060-900, Brazil

    Deuber Lincon da Silva Agostini & Aldo Eloizo Job

  3. Programa de Pós-Graduação em Ciência e Tecnologia de Materiais (POSMAT), Universidade Estadual Paulista, São Paulo, Brazil

    Fernanda Stuani Pereira & Deuber Lincon da Silva Agostini

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  1. Fernanda Stuani Pereira
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  2. Deuber Lincon da Silva Agostini
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  3. Aldo Eloizo Job
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  4. Eduardo René Pérez González
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Correspondence to Eduardo René Pérez González.

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Pereira, F.S., da Silva Agostini, D.L., Job, A.E. et al. Thermal studies of chitin–chitosan derivatives. J Therm Anal Calorim 114, 321–327 (2013). https://doi.org/10.1007/s10973-012-2835-z

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  • DOI: https://doi.org/10.1007/s10973-012-2835-z

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