Abstract
The linear and nonlinear viscoelastic behaviors of poly(ethylene oxide) (PEO) in aqueous media have been investigated as a function of concentration and molecular weight. A particular interest has been paid to study the effect of turbulent flow under stirring, inducing both shear and elongational stresses, on the rheological behavior of the polymer solutions. The comparison of intrinsic viscosity and viscoelastic properties between shaken and stirred PEO solutions is discussed at the molecular scale in terms of chain scission and aggregation. Results point out that the effect of the mechanical history on the rheological response of PEO solutions depends also on the concentration regime and molecular weight. Indeed, the influence of the dispersion procedure vanishes by decreasing both the concentration and the molecular weight.
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Paper presented at the de Gennes Discussion Conference held February 2–5, 2009 in Chamonix, France.
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Bossard, F., El Kissi, N., D’Aprea, A. et al. Influence of dispersion procedure on rheological properties of aqueous solutions of high molecular weight PEO. Rheol Acta 49, 529–540 (2010). https://doi.org/10.1007/s00397-009-0402-8
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DOI: https://doi.org/10.1007/s00397-009-0402-8