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Title of article :
Viscosity–temperature behavior of chitin solutions using lithium chloride/DMA as solvent Original Research Article
Author/Authors :
C.L. de Vasconcelos، نويسنده , , P.M. Bezerril، نويسنده , , M.R. Pereira، نويسنده , , M.F. Ginani، نويسنده , , J.L.C. Fonseca، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2011
Pages :
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Abstract :
Solutions of chitin in Li+/N,N-dimethylacetamide systems were studied via viscometry, using LiCl concentrations of 3% and 5% (m/v) and chitin concentrations ranging from 0.075 to 0.375 g L−1. The reduced viscosity number versus concentration plot showed a minimum that was related to the formation of Li+–Odouble bond; length as m-dashC complex moieties along chitin macromolecular chains. Viscosity behavior was affected by temperature according to the Eyring model: concentration dependence of flow enthalpy of activation was correlated to polymer–polymer interactions and flow entropy of activation to the stiffness of the complexed chitosan macromolecular chain.
Keywords :
Flow enthalpy of activation , Viscometry , Flow entropy of activation , Chitin
Journal title :
Carbohydrate Research
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Link To Document :