Abstract
Rheological properties were studied for aqueous solutions of poly(vinyl alcohol) containing sodium borate. The solution exhibited a marked shear thickening at a certain critical rate of shear, γ c and the flow was unstable at higher rates of shear. The loss modulus exhibited a maximum and the angular frequency corresponding to the maximum, ωMAX, was approximately equal to \(\dot \gamma _C \). These features were common to several measurements including various molecular weights and concentrations of polymer and various temperatures. Possible mechanism of shear thickening was discussed based on a temporary network model composed of crosslink points of a finite lifetime.
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Inoue, T., Osaki, K. Rheological properties of poly(vinyl alcohol)/sodium borate aqueous solutions. Rheol Acta 32, 550–555 (1993). https://doi.org/10.1007/BF00369071
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DOI: https://doi.org/10.1007/BF00369071