VISCOMETRIC STUDIES OF MICROCRYSTALLINE CHITOSAN/POLY(VINYL ALCOHOL) MIXTURES
Journal Title: Progress on Chemistry and Application of Chitin and its Derivatives - Year 2011, Vol 0, Issue
Abstract
In the present paper, the results of viscosity measurements in dilute solutions of microcrystalline chitosan (MCCh) with poly(vinyl alcohol) (PVA) of different degrees of hydrolysis are presented. Microcrystalline chitosan is blended with poly(vinyl alcohol) in aqueous 0.1 MCH3COOH/0.2 M NaCl. Viscosity measurements of dilute polymer solution were carried out in an Ubbelohde capillary viscometer. The final result depends on (I) the thermodynamic goodness of the solvent, on (II) the applied extrapolation method used for determination of the interaction parameters, on (III) the assumed miscibility criteria, on (IV) the degree of hydrolysis of PVA, and on (V) the blend composition.
Authors and Affiliations
Katarzyna Lewandowska
Keywords
Related Articles
- EP ID EP73638
- DOI -
- Views 92
- Downloads 0
IN VITRO STUDIES OF ADSORPTION OF ERYTHROMYCIN ON CHITOSANS FROM DIETARY SUPPLEMENTS
In clinical practice, in the treatment of obesity, a plurality of natural high-molecular compounds are used, the activity of which supports weight loss. During the use of dietary supplements containing chitosan, illness...
VAPOUR PERMEATION STUDY OF WATER AND ETHANOL THROUGH CROSSLINKED CHITOSAN AND ALGINATE MEMBRANES
A vapour permeation of water and ethanol through homogenous chitosan and alginate membranes was investigated. The influence of the polymer matrix and crosslinking agents, and measurement protocol on the transport propert...
THE INFLUENCE OF THE DEACETYLATION DEGREE OF CHITOSAN IN THE FORM OF FLAKES ON THE EFFECTIVENESS OF NITRATES V SORPTION FROM AQUEOUS SOLUTIONS
The influence of the degree of deacetylation of chitosan from the range of DD = 75–90% on the effectiveness of sorption of nitrates from aqueous solutions was investigated. The scope of the research included: determining...
Physicochemical properties of chitin-protein complex from shell of RED KING crab (Paralithodes camtchaticus) at various stages of molting cycle
It is worth of note that the studies have shown the substantial differences in the physicochemical characteristics of the chitin-protein complex isolated from the crab shell at various stages of the molting cycle. Perhap...
THE MECHANISM OF SORPTION OF Ag+ IONS ON CHITOSAN MICROGRANULES: IR AND NMR STUDIES
The method IR and NMR have been used to study the structure of chitosan microgranules chelated by Ag+ ions. The change of the structure was confirmed by XRD diffractograms which illustrated the crystalline structure. Ana...