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Proceedings Paper

Use of principal components analysis for detailed observation of the effects of deformation and relaxation on the C=O stretching band of a block polyurethane
Author(s): Charles E. Miller; Nicholas M. Reynolds
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Paper Abstract

A thin film of a block polyurethane copolymer (with a poly(tetramethylene oxide) soft segment, and a hard segment derived from butanediol and piperizine), was used for this study. FTIR spectra (in the C equals O region, 1650 to 1750 cm-1, 2 cm-1 nominal resolution) were collected during deformation and relaxation by a Nicolet 60SX FTIR spectrometer that was adapted to a stretching apparatus. Spectra at 20% extension intervals were collected as the sample was stretched to 200% extension, relaxed to 60% extension, and re-stretched to 300% extension. Principal components analysis of the spectra (after baseline correction, normalization, and subtraction of the average spectrum from all of the spectra) was performed with the UNSCRAMBLER software package (CAMO A/S, Trondheim, Norway).

Paper Details

Date Published: 1 March 1992
PDF: 2 pages
Proc. SPIE 1575, 8th Intl Conf on Fourier Transform Spectroscopy, (1 March 1992); doi: 10.1117/12.56454
Show Author Affiliations
Charles E. Miller, Norwegian Food Research Institute (Norway)
Nicholas M. Reynolds, Max-Planck-Institut fuer Polymerforschung (United States)


Published in SPIE Proceedings Vol. 1575:
8th Intl Conf on Fourier Transform Spectroscopy

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