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Polymer Bulletin
Published in: Polymer Bulletin 6/2009

01-12-2009 | Original Paper

Shear-thinning and viscosity synergism in mixed solution of guar gum and its etherified derivatives

Author: Meng Wu

Published in: Polymer Bulletin | Issue 6/2009

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Abstract

The flow properties of mixed solution of guar gum and carboxymethyl guar gum, including shear-thinning and viscosity synergism, have been studied at different mixed ratios, shear rates and temperatures using rheometer. The results show that addition of carboxymethyl guar gum enhances shear-thinning behavior and increases viscosity in guar gum solution at a given range of mixed ratios. The temperature-dependence of the mixed solution is markedly different from a single solution. The activation energy of blends with 50 and 75% of guar gum were determined to be 11.02 and 10.39 kJ mol−1, respectively, lower than that of a single solution. These results indicate that the network structure of viscous solution has been changed because carboxymethyl groups branched in galactomannans had changed the interaction among macromolecular chains.
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Metadata
Title
Shear-thinning and viscosity synergism in mixed solution of guar gum and its etherified derivatives
Author
Meng Wu
Publication date
01-12-2009
Publisher
Springer-Verlag
Published in
Polymer Bulletin / Issue 6/2009
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-009-0127-y

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