About: The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior     Goto   Sponge   NotDistinct   Permalink

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  • 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 crosslinking of the
  • 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 crosslinking of the (en)
Title
  • The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior
  • The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior (en)
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  • The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior
  • The Influence of Counterions of Different Valency on Carboxymethylcellulose Viscoelastic Behavior (en)
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  • RIV/00216305:26310/14:PU106910!RIV15-MSM-26310___
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  • 21368
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  • RIV/00216305:26310/14:PU106910
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  • counterions, viscoelasticity, carboxymethylcelulose, rheology, oscillation, gelation (en)
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  • [C80AA94B844A]
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  • New York
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  • Physics Research and Technology
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  • Rheology: theory, properties, and practical applications
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  • Chytil, Martin
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  • Nova Science Publishers, Inc.
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  • 978-1-62618-999-7
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  • 26310
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