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Nanocomposites Based on Layered Silicates and Epoxy Resins: Measurement of Clay Dispersion and Exfoliation using TEM, Solid-State NMR, and X-ray Diffraction Methods

  1. Antje Jung1,
  2. Karin Peter1,*,
  3. Dan E. Demco1,
  4. Dieter Jehnichen2,
  5. Martin Moeller1

Article first published online: 9 FEB 2012

DOI: 10.1002/macp.201100594

Issue

Macromolecular Chemistry and Physics

Macromolecular Chemistry and Physics

Volume 213, Issue 4, pages 389–400, February 27, 2012

Additional Information

How to Cite

Jung, A., Peter, K., Demco, D. E., Jehnichen, D. and Moeller, M. (2012), Nanocomposites Based on Layered Silicates and Epoxy Resins: Measurement of Clay Dispersion and Exfoliation using TEM, Solid-State NMR, and X-ray Diffraction Methods. Macromol. Chem. Phys., 213: 389–400. doi: 10.1002/macp.201100594

Author Information

  1. 1

    DWI at RWTH Aachen University e.V., Forckenbeckstrasse 50, 52056 Aachen, Germany

  2. 2

    Leibniz-Institut of Polymer Research Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany

*DWI at RWTH Aachen University e.V., Forckenbeckstrasse 50, 52056 Aachen, Germany.

Publication History

  1. Issue published online: 15 FEB 2012
  2. Article first published online: 9 FEB 2012
  3. Manuscript Received: 26 OCT 2011

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Keywords:

  • exfoliation;
  • layered silicates;
  • 1H solid-state NMR;
  • TEM;
  • XRD

Abstract

In an epoxy/layered silicate nanocomposite containing different organically modified layered silicats, the effect of various organic modifications and the layered silicate content on the layer distances are investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD) measurements, and 1H solid-state NMR. TEM micrographs were evaluated using a semi-quantitative method. The effect of paramagnetic impurities present in the clay is used to obtain overall sample information related to the degree of exfoliation by 1H solid-state NMR. A new model for determination of the degree of exfoliation by proton longitudinal relaxation rate measurements is developed.

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