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Application and comparison of algorithms for the evaluation of interferograms

III: Estimation of refractive index changes in polymer films induced by interaction with organic solvent molecules

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  • General Chemistry/Chemometrics
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Abstract

Organic molecules are easily absorbed by polymers. This interaction induces changes in the volume and the refractive index of the resulting mixture phase. The change in the bulk refractive index is directly related to the volume fraction of the organic substance in the resulting mixture. It is essential for an understanding of the underlying phenomena to study the change in volume and the change in refractive index separately. A novel method is presented to separate both effects by white light interferometric measurements on thin polymer films. This method is based on a spectral fitting of amplitude and phase shift effects in the interferograms.

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Authors and Affiliations

  1. Institute for Physical and Theoretical Chemistry, University of Tübingen, Auf der Morgenstelle 8, D-72076, Tübingen, Germany

    Gerolf Kraus, Albrecht Klotz, Jens Seemann, Karin Spaeth & Günter Gauglitz

Authors
  1. Gerolf Kraus
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  2. Albrecht Klotz
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  3. Jens Seemann
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  4. Karin Spaeth
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  5. Günter Gauglitz
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Dedicated to Professor K. Doerffel on the occasion of his 70th birthday

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Kraus, G., Klotz, A., Seemann, J. et al. Application and comparison of algorithms for the evaluation of interferograms. Fresenius J Anal Chem 352, 426–430 (1995). https://doi.org/10.1007/BF00323361

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  • DOI: https://doi.org/10.1007/BF00323361

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