THERMOGRAVIMETRIC STUDIES OF CHITIN DERIVATIVES .1.

Simple item page
dc.contributor.authorCARDENAS, G
dc.contributor.authorRETAMAL, J
dc.contributor.authorTAGLE, LH
dc.date.accessioned2025-01-23T19:21:55Z
dc.date.available2025-01-23T19:21:55Z
dc.date.issued1993
dc.description.abstractThe thermal stabilities of chitin derivatives (chitin; chitin iodine, acetate, phenylthiourea, tosylate, butyl xantate, benzyl xantate, isocyanate hexane. benzoate and benzoylate) have been studied by thermogravimetry (TG) between 278 K and 823 K under nitrogen flow. The kinetic data thus obtained indicate that the thermostabilities decrease in the order: chitin-acetate > chitin-phenylthiourea > chitin-isocyanate hexane > chitin-butylxantate > chitin-benzoate > chitin-benzylxanthate > chitin-iodine > chitin benzoylate.
dc.description.abstractThe thermal stability seems to depend on the kind of bond established between the chitin and the reactant. Tosylate exhibits the lowest Ea, probably due to its property as a good leaving group. Furthermore, chitin-acetate has the highest Ea due to its similarity with the pendant group which enables the macromolecule to achieve better electric resonance stabilization.
dc.description.abstractThe reaction order for the thermal decomposition of these chitin polymers is zero. This means that we are concerned with a single step decomposition mechanism. The pre-exponential factor, the reaction order, the decomposition temperature and the activation energy of the decomposition for chitin derivatives have been determined.
dc.fuente.origenWOS
dc.identifier.issn0091-4037
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/98906
dc.identifier.wosidWOS:A1993MD29200004
dc.issue.numero3-4
dc.language.isoen
dc.pagina.final146
dc.pagina.inicio137
dc.revistaInternational journal of polymeric materials
dc.rightsacceso restringido
dc.subjectCHITIN
dc.subjectNATURAL POLYMERS
dc.subjectCRAB SHELLS
dc.subjectREACTION ORDER
dc.subjectDECOMPOSITION TEMPERATURE
dc.subjectACTIVATION ENERGY
dc.titleTHERMOGRAVIMETRIC STUDIES OF CHITIN DERIVATIVES .1.
dc.typeartículo
dc.volumen21
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas