The intrinsic viscosities and shear dependence of viscosities of solutions of poly(ethylene oxide) in t‐butyl alcohol/water mixtures were investigated. A marked minimum in intrinsic viscosity at a certain alcohol concentration has been correlated with changes in the water structure brought about by the addition of alcohol. The results are interpreted in terms of rigidity‐flexibility transformations of the polymer chain.
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Blandamer et al. (1969) studied this question.
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