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Spherulite formation in a “noncrystalline” two-dimensional hydrogen-bond assembly

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Summary

4-Urazoyl benzoic acid groups 1 are attached as terminal end group to an oligoisobutene. According to wide-angle X-ray scattering the material is amorphous. Differential scanning calorimetry, small-angle X-ray scattering, transmission electron microscopy, and polarizing microscopy show that the polar head groups form ordered two-dimensional assemblies which organize into spherulites. Temperature-dependent SAXS measurements and the d.s.c. analysis give a close insight into the order-disorder (“melting”) process of the two-dimensional clusters which form macroscopic spherulites. The order-disorder transition of the clusters is closely related to the dynamics and order of the polyisobutene chain.

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Author notes

  1. Maria Schirle

    Present address: Institut für Polymere, ETH Zürich, CH-8092, Zürich, Switzerland

Authors and Affiliations

  1. Institut für Organische Chemie, Johannes-Gutenberg-Universität, J. J. Becherweg, D-55099, Mainz, Germany

    Maria Schirle

  2. Abteilung für Experimentelle Physik, Universität Ulm, Albert-Einstein-Allee 11, D-89069, Ulm, Germany

    Ingrid Hoffmann, Thomas Pieper, Hanns-Georg Kilian & Reimund Stadler

Authors
  1. Maria Schirle
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  2. Ingrid Hoffmann
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  3. Thomas Pieper
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  4. Hanns-Georg Kilian
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  5. Reimund Stadler
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Additional information

Dedicated to the memory of Ingrid Hoffmann (died 12. 6. 1993)

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Schirle, M., Hoffmann, I., Pieper, T. et al. Spherulite formation in a “noncrystalline” two-dimensional hydrogen-bond assembly. Polymer Bulletin 36, 95–102 (1996). https://doi.org/10.1007/BF00296013

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  • DOI: https://doi.org/10.1007/BF00296013

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