Rheological investigation of aqueous solutions of poly(vinyl alcohol) during ageing |
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| Authors: | E. Prokopová P. Štern O. Quadrat |
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| Affiliation: | (1) Present address: Institute of Macromolecular Chemistry, Czechoslovak Academy of Sciences, Prague;(2) Institute for Hydrodynamics, Czechoslovak Academy of Sciences, Prague, Czechoslovakia |
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| Abstract: | The changes in viscosity and normal stress difference during the ageing of concentrated aqueous solutions of poly(vinyl alcohol) prepared at 80 °C and the effect of the procedure used in the preparation of solutions on the course of these changes are described. The results are interpreted by means of shear complianceJe and relaxation time 0. |
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| Keywords: | Polyvinylalcohol ageing concentrated solutions non-Newtonian viscosity normal stress |
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