Dynamic Uniaxial Extensional Viscosities and Their Importance in the Mechanical Stability of Water-Soluble Carbohydrate Polymer Solutions

  • David A. Soules
  • J. Edward Glass


The mechanical stabilities of a series of carbohydrate polymers are examined and correlated to aqueous solution dynamic uniaxial extensional viscosities. Both properties relate to the carbohydrate polymer’s conformation in aqueous solution. As noted in the stability of guaran solutions this property is not reflected by Mark-Houwink coefficients determined under static conditions. Helical or rigid rod carbohydrate polymers exhibit the greatest mechanical stability in solution. Solution blends of the carbohydrate polymers with high molecular weight poly(oxyethylene) also were studied. Unique rheological responses were observed in Sclerotium glucanium polysaccharide/poly(oxyethylene) blends at equal weight percents (e.g., lower, low-shear-rate viscosities and the absence of a high extensional viscosity), suggesting complexation. Such complexation appears to effectively disrupt the three dimensional structure of Sclerotium glucanium polysaccharide in aqueous solution (storage modulus studies) and decrease the flexibility of poly(oxyethylene).


Well Bore Extensional Viscosity Carbohydrate Polymer Xanthomonas Campestris Waring Blendor 
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Copyright information

© Springer Science+Business Media New York 1988

Authors and Affiliations

  • David A. Soules
    • 1
  • J. Edward Glass
    • 1
  1. 1.Polymers and Coatings DepartmentNorth Dakota State UniversityFargoUSA

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