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 67
- Downloads 0
HETEROGENEOUS DEACETYLATION OF CHITIN DEGRADED WITH HYDROGEN PEROXIDE IN A MICROWAVE FIELD
Two-step procedure of obtaining chitosan with tailored properties has been elaborated. In the first step chitin from the shells of krill (Euphausia superba) and common shrimp (Crangon crangon [L.]) was subjected simultan...
THE INFLUENCE OF A DENTAL FORMULATION PREPARED WITH CHITOSAN ON THE PHARMACEUTICAL AVAILABILITY OF CLOTRIMAZOLE
The present work involves the development of a dental gel composition obtained on the basis of clotrimazole incorporated into chitosan in order to improve drug solubility. Solid dispersions were prepared by using two met...
WETTABILITY OF HYBRID CHITOSAN/PHOSPHOLIPID COATINGS
Solution spreading and Langmuir-Blodgett/Schaefer techniques were used for preparation of chitosan/phospholipid (DPPC) films on air plasma treated polyethylene terephthalate (PET) plates. The surface wetting properties w...
MECHANISM OF FORMATION OF THERMOSENSITIVE CHITOSAN CHLORIDE GELS
In these studies, an attempt has been made to explain the mechanism of gel formation. The studies were carried out to develop the mechanism of chitosan gel formation in the presence of glycerol phosphate GP, taking into...
PHYSICO-CHEMICAL PROPERTIES OF CHITOSAN COMPOSITES WITH SYNTHETIC POLYMERS AND INORGANIC ADDITIVES
In the present study the results of rheological measurements and atomic force microscopy (AFM) of polymer composites with montmorillonite (MMT) are presented. Chitosan is blended with synthetic polymers and inorganic add...