Mutual diffusion coefficients, D, were determined for aqueous solutions of sodium hyaluronate (NaHy) at 25 °C and concentrations ranging from 0.00 to 1.00 g·dm(-3) using the Taylor dispersion technique. From these experimental data, it was possible to estimate some parameters, such as the hydrodynamic radius Rh, and the diffusion coefficient at infinitesimal concentration, D0, of hyaluronate ion, permitting us to have a better understanding of the structure of these systems of sodium hyaluronate in aqueous solutions. The additional viscosity measurements were done and Huggins constant, kH, and limiting viscosity number, [η], were computed for interaction NaHy/water and NaHy/NaHy determination.

Centre of Polymer Systems Tomas Bata University in Zlín nám T G Masaryka 5555 Zlín 760 01 Czech Republic

Coimbra Chemistry Centre Department of Chemistry University of Coimbra Coimbra 3004 535 Portugal

Department of Physics and Material Engineering Faculty of Technology Tomas Bata University in Zlín nám T G Masaryka 275 Zlín 762 72 Czech Republic

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