Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 114, Issue 1, Pages 321-327Publisher
SPRINGER
DOI: 10.1007/s10973-012-2835-z
Keywords
Chitin-chitosan biopolymer; N-alkylation; Azo compounds; TG/DTG and DSC
Funding
- Fundacao de Apoio a Pesquisa do Estado de Sao Paulo (FAPESP)
- Programa de Pos-graduacao em Ciencia e Tecnologia de Materiais (POSMAT)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
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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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