The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior

Kód výsledku v 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>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior

Popis výsledku anglicky

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

Druh

C - Kapitola v odborné knize

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Rheology: theory, properties, and practical applications

ISBN

978-1-62618-999-7

Počet stran výsledku

9

Strana od-do

349-357

Počet stran knihy

496

Název nakladatele

Nova Science Publishers, Inc.

Místo vydání

New York

Kód UT WoS kapitoly

—