Polyurethane monitoring by mid-infrared fiber Fourier transform spectrometry

James A. de Haseth; Jennifer E. Andrews

doi:10.1117/12.56438

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1 March 1992 Polyurethane monitoring by mid-infrared fiber Fourier transform spectrometry

James A. de Haseth, Jennifer E. Andrews

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Proceedings Volume 1575, 8th Intl Conf on Fourier Transform Spectroscopy; (1992) https://doi.org/10.1117/12.56438
Event: Eighth International Conference on Fourier Transform Spectroscopy, 1991, Lubeck-Travemunde, Germany

Abstract

Chalcogenide fibers that transmit radiation in the mid-infrared region have been coupled to a Fourier transform infrared spectrometer. The fibers are used to measure attenuated total reflectance spectra of samples that are remote, or do not lend themselves to conventional sampling methods. The samples used in this study are polyurethane foams and spectra are collected while the foams are forming. The reaction intermediates can be monitored, as well as the reaction kinetics. Spectra can be collected rapidly; faster than one spectrum per second, however, the reaction rates in this study do not require temporal resolutions of faster than 10 seconds. The collected spectra are subjected to factor analysis to identify the reactants, intermediates and products.

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James A. de Haseth and Jennifer E. Andrews "Polyurethane monitoring by mid-infrared fiber Fourier transform spectrometry", Proc. SPIE 1575, 8th Intl Conf on Fourier Transform Spectroscopy, (1 March 1992); https://doi.org/10.1117/12.56438

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