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A modified rheometer for in-situ radial and tangential SAXS studies on shear-induced alignment

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Abstract

A tooth rheometer designed to investigate the influence of large amplitude oscillatory shear on the macroscopic orientation of complex fluids is described. The rheometer allows in-situ two-directional small-angle scattering measurements, making it possible to observe in particular the orientation process of hierarchically structured block copolymers in dynamics. Experiments performed with a linear poly(vinyl methyl ether) show that, despite a considerable gap/width ratio, the rheometer can be used for adequate rheological measurements. In addition we found an unexpected dependence of the dynamic parameters on the rheometer gap. The small amount of sample required favors the use of this rheometer for measuring the rheological characteristics of new compounds.

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Authors and Affiliations

  1. Laboratory of Polymer Chemistry, Materials Science Centre, Dutch Polymer Institute, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands

    Evgeny Polushkin, Gert Alberda van Ekenstein & Gerrit ten Brinke

  2. Department of Engineering Physics and Mathematics and Center for New Materials, Helsinki University of Technology, P.O. Box 2200, FIN-02015 HUT, Espoo, Finland

    Olli Ikkala

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  1. Evgeny Polushkin
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  2. Gert Alberda van Ekenstein
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  3. Olli Ikkala
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  4. Gerrit ten Brinke
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Correspondence to Evgeny Polushkin.

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Polushkin, E., Alberda van Ekenstein, G., Ikkala, O. et al. A modified rheometer for in-situ radial and tangential SAXS studies on shear-induced alignment. Rheol Acta 43, 364–372 (2004). https://doi.org/10.1007/s00397-003-0352-5

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