Linear dichroism measurements by polarization modulation FTIR spectroscopy: quantitative analysis and application to polymers

Thierry Buffeteau; B. Desbat; Michel Pezolet; J. M. Turlet

doi:10.1117/12.166766

31 January 1994 Linear dichroism measurements by polarization modulation FTIR spectroscopy: quantitative analysis and application to polymers

Thierry Buffeteau, B. Desbat, Michel Pezolet, J. M. Turlet

Author Affiliations +

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166766
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

Infrared linear dichroism measurements on stretched poly(vinyl chloride) (PVC) films using polarization modulation and simultaneous two channel acquisition demonstrate the high sensitivity of this method, especially for very small deformations of the polymer. With proper calibrations, dichroic difference spectra obtained by polarization modulation can be related quantitatively to the orientation function <P₂(cos(Theta) )> for draw ratios as high as three. Curves relating the orientation function of the polymer chains and the draw ratio show much less dispersion of the data points than those obtained from conventional dichroic ratio measurement.

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Thierry Buffeteau, B. Desbat, Michel Pezolet, and J. M. Turlet "Linear dichroism measurements by polarization modulation FTIR spectroscopy: quantitative analysis and application to polymers", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166766

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