VISCOMETRIC STUDIES OF MICROCRYSTALLINE CHITOSAN/POLY(VINYL ALCOHOL) MIXTURES

• Authors: Katarzyna Lewandowska
• Languages of publication: EN

Abstracts

EN

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.

Keywords

EN

microcrystalline chitosan; poly(vinyl alcohol); polymer blends; viscometric study

• Publisher: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
• Journal: Progress on Chemistry and Application of Chitin and its Derivatives
• Year: 2011
• Volume: 16
• Pages: 43 - 48

Contributors

author

Katarzyna Lewandowska

• Faculty of Chemistry, Nicolaus Copernicus University,

References

• Krigbaum W. R., Wall F. T.; (1950) Viscosities of binary polymeric mixtures. J Polym Sci Vol. 5, pp. 505-514.
• Catsiff E. H., Hewett W. A.; (1962) The interaction of two dissimilar polymers in solution. J Appl Polym Sci vol. 6, pp. S30-S32.
• Chee K. K.; (1990) Determination of polymer-polymer miscibility by viscometry. Eur Polym J Vol. 26, pp. 423-426.
• Garcia R., Melad O., Gómez C. M., Figueruelo J. E., Campos A.; (1999) Viscometric study on the compatibility of polymer-polymer mixtures in solution. Eur Polym J Vol. 35, pp. 47-55.
• Lewandowska K.; (2005) The miscibility of poly(vinyl alcohol)/poly(N−vinylpyrrolidone) blends investigated in dilute solutions and solids. Eur Polym J Vol. 41, pp. 55-64.
• Huggins M. H.; (1942) The viscosity of dilute solutions of long-chain molecules. IV. Dependence on concentration. J Am Chem Soc Vol. 64, pp. 2716-2718.
• Bohdanecký M., Kovář I.; (1982) Viscosity of Polymer Solution. vol2 In: Jenkins AD (ed) Elsevier Science, Amsterdam.
• Struszczyk H.; (1987) Microcrystalline chitosan. I. Preparation and properties of microcrystalline chitosan. J Appl Polym Sci Vol. 33, pp. 177-189.

• Document Type: article