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Different behaviors of concentrated polysaccharide systems in large-amplitude oscillating shear fields

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Abstract

Two series of oscillatory flow tests were carried out on two concentrated polysaccharide systems (hydroxyethyl guar gum and scleroglucan) in order to evaluate the possibilities offered by large-deformation techniques for the discrimination between different classes of macromolecular systems (i.e., entanglement networks and weak gels). Frequently and strain sweeps, as well as combined steady and oscillatory shear tests were performed to analyze the influence of strain amplitude and of the superposed parallel shear rate on the dynamic properties of these materials.

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Authors and Affiliations

  1. Institute of Applied and Industrial Chemistry, University of Trieste, Via Valerio 2, I-34127, Italy

    R. Lapasin, S. Pricl & P. Tracanelli

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  1. R. Lapasin
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  2. S. Pricl
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  3. P. Tracanelli
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Lapasin, R., Pricl, S. & Tracanelli, P. Different behaviors of concentrated polysaccharide systems in large-amplitude oscillating shear fields. Rheola Acta 31, 374–380 (1992). https://doi.org/10.1007/BF00418335

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  • DOI: https://doi.org/10.1007/BF00418335

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