Synthesis and characterization of chitosan alkyl carbamates

Cardenas, G; Paredes, JC; Cabrera G.; Casals P.

Abstract

The synthesis of chitosan methylcarbamate (ChMC) and ethylcarbamate (ChEC) is described by using a new methodology. Polymers with substitution degrees up to 63% for ChEC and 68.5% for ChMC were obtained. Derivatives with lower substitutions were acid soluble but those with higher ones were completely insoluble. This could be due to the loss in hydrophilic sites when the substitution degree increases. The reaction conditions and degree of substitution obtained for both derivatives were also described. A complete chemical characterization was carried out by spectroscopic techniques. The thermal degradation of chitosan and derivatives were studied in the range 25-500°C and both derivatives were shown to be thermally less stable than chitosan. © 2002 Wiley Periodicals, Inc. J App1 Polym Sci 86: 2742-2447, 2002.

Más información

Título según WOS: Synthesis and characterization of chitosan alkyl carbamates
Título según SCOPUS: Synthesis and characterization of chitosan alkyl carbamates
Título de la Revista: JOURNAL OF APPLIED POLYMER SCIENCE
Volumen: 86
Número: 11
Editorial: Wiley
Fecha de publicación: 2002
Página de inicio: 2742
Página final: 2747
Idioma: English
URL: http://doi.wiley.com/10.1002/app.11252
DOI:

10.1002/app.11252

Notas: ISI, SCOPUS