RHEOLOGICAL PROPERTIES OF CHITOSAN BLENDS WITH PARTIALLY HYDROLYZED POLYACRYLAMIDE IN DIFFERENT SOLVENTS
Journal Title: Progress on Chemistry and Application of Chitin and its Derivatives - Year 2012, Vol 0, Issue
Abstract
In the present paper, the results of rheological measurements in solutions of chitosan (Ch) with partially hydrolyzed polyacrylamide (HPAM) are presented. Aqueous acetic acid, lactic acid and aqueous acetic acid/NaCl were used as solvents for chitosan, HPAM and Ch/HPAM solution blends. The criterion of miscibility of solution blends, based on the additivity rule of apparent shear viscosity (ηa) has been discussed. The rheological parameters from power law (Ostwald de Waele model) and activation energy of viscous flow (Ea) have been calculated from the flow curves and Arrhenius plots, respectively. It was found that studied polymer solutions exhibited the non-Newtonian behaviour with shear-thinning and/or shear-thickening areas. The final result depends on the thermodynamic goodness of the solvent and on the blend composition.
Authors and Affiliations
Katarzyna Lewandowska
Keywords
Related Articles
- EP ID EP73558
- DOI -
- Views 104
- Downloads 0
STUDIES ON THE USABLE PROPERTIES OF INNOVATIVE WOUND DRESSINGS
The new implemented wound dressings should meet several requirements connected with the clinical safety and performance. The series of PN-EN 13726 Standards describes the tests methods for the verification the most impor...
CHITOSAN DICARBOXYLIC ACID SALTS
It is possible to obtain salts with specified properties from adipic, succinic and fumaric acids and chitosans of varying degrees of deacetylation and viscosity-average molecular weight. The temperature of the process, t...
SYNTHESIS OF SILVER NANOPARTICLES IN A CHITOSAN SOLUTION
In the present study silver nanoparticles were obtained using the ability of chitosan to form chelate compounds with metal ions and taking advantage of its reducing properties. The reduction process was conducted at the...
CHARACTERISATION OF THIN CHITOSAN FILMS FOR GUIDED TISSUE REGENERATION PURPOSES
The morphology and structure of thin films containing chitosan (Ch) with montmorillonite (MMT) were characterised by scanning electron microscopy (SEM), atomic force microscopy (AFM) and attenuated total reflectance Four...
MOLECULAR STRUCTURE AND FORMATION OF CHITOSAN AND PECTIN BASED THIN FILMS
In this study using methods of Atomic force microscopy (AFM) and Quartz crystal microbalance with dissipation monitoring (QCM-D) the special characteristics of formation and architecture of thin films coatings based on n...