کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1389209 982853 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Viscosity–temperature behavior of chitin solutions using lithium chloride/DMA as solvent
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Viscosity–temperature behavior of chitin solutions using lithium chloride/DMA as solvent
چکیده انگلیسی

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+–OC 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.

Schematic diagram describing the equilibrium involved in the formation of a complex species from the interaction between a carbonyl group along the chitin macromolecular chain and Li+.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Research - Volume 346, Issue 5, 1 April 2011, Pages 614–618
نویسندگان
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