Thermal studies of chitin-chitosan derivatives
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Data
2012-12-27
Autores
Pereira, Fernanda Stuani [UNESP]
da Silva Agostini, Deuber Lincon [UNESP]
Job, Aldo Eloizo [UNESP]
González, Eduardo René Pérez [UNESP]
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Resumo
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. © 2012 Akadémiai Kiadó, Budapest, Hungary.
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Azo compounds, Chitin-chitosan biopolymer, N-alkylation, TG/DTG and DSC
Como citar
Journal of Thermal Analysis and Calorimetry, p. 1-7.