20 July 2004 Dynamic infrared spectroscopy with a step-scan FT-IR for the characterization of polymers
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Proceedings Volume 5507, XVI International Conference on Spectroscopy of Molecules and Crystals; (2004); doi: 10.1117/12.570020
Event: XVI International Conference on Spectroscopy of Molecules and Crystals, 2003, Sevastopol, Ukraine
Abstract
Step Scan creates an identical JR modulation frequency over the entire JR spectrum. This is a prerequisite for quantitative photoacoustic spectroscopy and depth profiling. 2D conelation maps have been created for photoacoustic spectra as well as for dynamic difference spectra of polymers under periodic external mechanical perturbation. From the positions and signs of cross peaks in the 2D-maps the relative direction and timing of reorientational motions can be determined Depth profiling has been demonstrated on ethylene-vinyl acetate copolymer on polypropylene. The effects of mechanical stress on polymers using 2D-FT-IR ofhave been shown for isotactic polypropylene and a polyesther/polyurethane block copolymer.
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Uwe Eichhoff, Arno Simon, "Dynamic infrared spectroscopy with a step-scan FT-IR for the characterization of polymers", Proc. SPIE 5507, XVI International Conference on Spectroscopy of Molecules and Crystals, (20 July 2004); doi: 10.1117/12.570020; https://doi.org/10.1117/12.570020
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KEYWORDS
Polymers

Modulation

Digital signal processing

FT-IR spectroscopy

Photoacoustic spectroscopy

Infrared spectroscopy

Phase shift keying

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