Aqueous solutions of microbially produced sodium hyaluronate in phosphate buffered saline (, ) were characterized with regard to their molecular parameters and viscoelastic behavior. The weight-average molar mass , -average radius of gyration , and their distributions were determined using a hyphenated assembly of size exclusion chromatography, multi-angle light scattering, and a differential refractive index detector. Correlation of the obtained results with viscometric data enabled the establishment of and relationships (; ). Viscoelastic behavior was investigated by steady state shear experiments. The viscosity yield was determined for varying concentrations and molar masses using shear rates from to . The elastic behavior in shear flow, represented by the first normal stress difference , has been detected on one hand via rheo-mechanical experiments and on the other hand being correlated from the rheo-optical material functions flow birefringence and its orientation utilizing the stress-optical rule. This correlation enabled the extension of the measurement range toward lower absolute values of of more than two decades. The correlated values were in good agreement with the data obtained by rheo-mechanical measurements.
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July 2009
Research Article|
July 01 2009
Determination of the viscoelastic behavior of sodium hyaluronate in phosphate buffered saline with rheo-mechanical and rheo-optical methods
F. Meyer;
F. Meyer
Institute of Technical and Macromolecular Chemistry,
University of Hamburg
, 20146 Hamburg, Germany
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D. Lohmann;
D. Lohmann
Institute of Technical and Macromolecular Chemistry,
University of Hamburg
, 20146 Hamburg, Germany
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W.-M. Kulicke
W.-M. Kulicke
a)
Institute of Technical and Macromolecular Chemistry,
University of Hamburg
, 20146 Hamburg, Germany
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a)
Author to whom correspondence should be addressed; electronic mail: [email protected]
J. Rheol. 53, 799–818 (2009)
Article history
Received:
October 08 2008
Citation
F. Meyer, D. Lohmann, W.-M. Kulicke; Determination of the viscoelastic behavior of sodium hyaluronate in phosphate buffered saline with rheo-mechanical and rheo-optical methods. J. Rheol. 1 July 2009; 53 (4): 799–818. https://doi.org/10.1122/1.3122985
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