Effect of hydrolysis on heat capacity, thermodynamic functions, and the relaxation transition of crab chitin and chitosan
Abstract
The heat capacity of crab chitin and chitosan is measured in a vacuum adiabatic calorimeter at 10-330 K. The thermodynamic characteristics (enthalpy, entropy, and Gibbs function) are calculated at T → 0 K to 330 K. Differential thermal analysis is used to calculate the relaxation transitions and thermal degradation of chitin and chitosan at 80-600 K. Acid hydrolysis is performed and its effect on the physicochemical properties and thermodynamic functions of chitin and chitosan is studied.
- Publication:
-
Russian Journal of Physical Chemistry A
- Pub Date:
- February 2014
- DOI:
- 10.1134/S0036024414020113
- Bibcode:
- 2014RJPCA..88..221K
- Keywords:
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- heat capacity;
- thermodynamic functions;
- relaxation transitions;
- chitin;
- chitosan;
- hydrolysis