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Effect of molecular weight and molecular weight distribution on the rheological properties of aqueous poly(ethylene oxide) solution

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Abstract

The effect of the molecular weight and the molecular weight distribution on the rheological properties of aqueous poly(ethylene oxide) (PEO) solutions has been investigated with four PEO samples differing in their Mw, Mw/Mn and purity. The main result of this study is that the steady shear viscosity as well as the complex dynamic viscosity of the samples with broad molecular weight distribution greatly differed from the viscosities of the samples having a narrow molecular weight distribution. Furthermore, the samples with broad molecular weight distribution showed a distinct molecular weight dependent non-Newtonian behavior at increasing shear rates and frequencies. This behavior was not observed for the sample with a narrow molecular weight distribution. Both effects are mainly attributed to the influence of the high molecular weight fraction in the PEO samples of broad molecular weight distribution. The often reported degradation of PEO solutions was not observed within the time scale of our experiment.

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Authors and Affiliations

  1. Institut für Technische Chemie der TU Braunschweig, Hans-Sommer-Straße 10, D-3300, Braunschweig, Federal Republic of Germany

    W. -M. Kulicke & M. Elsabee

  2. Institut für Makromolekulare Chemie der Universität Freiburg, Hermann-Staudinger-Haus, Stefan-Meier-Straße 31, D-7800, Freiburg i. Br., Federal Republic of Germany

    C. D. Eisenbach & M. Peuscher

Authors
  1. W. -M. Kulicke
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  2. M. Elsabee
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  3. C. D. Eisenbach
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  4. M. Peuscher
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Dedicated to Prof. Dr. H.-J. Cantow on the occasion of his 60th birthday

On leave from Cairo University, Giza, Egypt

The support of this work by the Deutsche Forschungsgemeinschaft (DFG) is gratefully acknowledged.

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Kulicke, W.M., Elsabee, M., Eisenbach, C.D. et al. Effect of molecular weight and molecular weight distribution on the rheological properties of aqueous poly(ethylene oxide) solution. Polymer Bulletin 9, 190–197 (1983). https://doi.org/10.1007/BF00283706

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  • DOI: https://doi.org/10.1007/BF00283706

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