Rheological properties of solution of polyethersulfone in dimethyl sulfoxid

Abstract

The rheological properties of solution of polyethersulfone(PES) in dimethyl sulfoxid(DMSO) were investigated on a HAAK RS150 cone-and-plate rheological instrument, including the dependence of non-Newtonian Index, apparent viscosity, zero shear viscosity on concentration and temperature of the solutions. Apparent viscosity η_a at same shear rate increases with increasing PES concentration. Non-Newtonian Index n decreases with increasing concentration and increases with increasing temperature. Zero shear viscosity decreases in an index manner with increasing temperature. When PES content is 24%(mass fraction), amount of macromolecule tangling points of solution is near saturation value. Tangling points do not increase or increase little with increasing PES concentration so that the flow activation energy E_η changes little.

Keywords

polyethersulfone / dimethyl sulfoxid / rheological properties

References

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