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Proceedings Paper

Rheo-optical vibrational spectroscopy of poly(ethylene terephthalate)
Author(s): U. Hoffmann; S. Okretic; Frank Pfeiffer; N. Voelkl; M. Zahedi Azad; Heinz W. Siesler
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Paper Abstract

FT-IR spectroscopy is a fast and informative method for the characterization of transient structural changes during deformation and relaxation processes of polymers. These rheo- optical techniques were used to determine changes in orientation, conformation and state of order during elongation, recovery and stress relaxation in poly(ethylene terephthalate) (PET) at various temperatures and sample geometries. Near-infrared (NIR) spectroscopy is more advantageous for applications in industrial process-control, since light-fiber optics can be used and a wider range of film thicknesses can be investigated. Frequently, the NIR region yields less information than the mid-infrared region and it is necessary to calibrate MIR results to NIR spectra by chemometric methods (e.g., partial least squares).

Paper Details

Date Published: 31 January 1994
PDF: 2 pages
Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); doi: 10.1117/12.166694
Show Author Affiliations
U. Hoffmann, Univ. of Essen (Germany)
S. Okretic, Univ. of Essen (Germany)
Frank Pfeiffer, Univ. of Essen (Germany)
N. Voelkl, Univ. of Essen (Germany)
M. Zahedi Azad, Univ. of Essen (Germany)
Heinz W. Siesler, Univ. of Essen (Germany)


Published in SPIE Proceedings Vol. 2089:
9th International Conference on Fourier Transform Spectroscopy
John E. Bertie; Hal Wieser, Editor(s)

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