The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F14%3APU106910" target="_blank" >RIV/00216305:26310/14:PU106910 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior
Original language description
This chapter focuses on an investigation of various counterions effect on viscoleastic behavior of sodium carboxymethylcellulose (Na-CMC) in aqueous solutions. Besides, the influence of the polymer concentration is also discussed. The concentration series of Na-CMC aqueous solutions with the presence of Na+, Ca2+ and Al3+ ions in different molar ratios to the polymer were investigated by means of oscillatory measurements. The viscoelastic properties were discussed particularly in terms of the complex modulus (G*) and the loss angle (delta). Two opposite effects were observed; a slight reinforcement of the elasticity and the overall mechanical resistance as the concentration of the Na-CMC increased on one side, and a profound decrease in delta, in the presence of Ca2+ counterions even at low CMC concentrations on the other. The former phenomenon is attributed to mainly polymer chains mutual interactions and their entanglements, while the latter is assumed to be due to intramolecular cro
Czech name
—
Czech description
—

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)