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Proceedings Paper

Dynamic fourier transform infrared spectroscopy of liquid crystals and polymer films
Author(s): Richard Alan Palmer; Vasilis G. Gregoriou; Ross W. Jacobson; James L. Chao
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Paper Abstract

Step-scan and continuous-scan FT-IR methods have been used to investigate the molecular and sub-molecular dynamics of polymer and liquid crystal films in response to synchronously modulated (ac) mechanical and electric fields and to pulsed (dc) electric fields. In these experiments the relative response times of different components in copolymers and blends, and of different parts of the same liquid crystal molecule are inferred from the response times and/or phase lags observed for the characteristics functional group frequencies. The interpretation of the ac data is enhanced by 2-D frequency correlation analysis. Examples illustrated are of the dynamic polymer rheology of the SBS triblock copolymer KratonTM and of the electro-reorientation dynamics of the nematic liquid crystal 5PCH.

Paper Details

Date Published: 31 January 1994
PDF: 2 pages
Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); doi: 10.1117/12.166617
Show Author Affiliations
Richard Alan Palmer, Duke Univ. (United States)
Vasilis G. Gregoriou, Duke Univ. (United States)
Ross W. Jacobson, Duke Univ. (United States)
James L. Chao, IBM Corp. (United States)

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

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