Dynamic fourier transform infrared spectroscopy of liquid crystals and polymer films

Richard Alan Palmer; Vasilis G. Gregoriou; Ross W. Jacobson; James L. Chao

doi:10.1117/12.166617

31 January 1994 Dynamic FTIR spectroscopy of liquid crystals and polymer films

Richard Alan Palmer, Vasilis G. Gregoriou, Ross W. Jacobson, James L. Chao

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166617
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

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 Kraton^TM and of the electro-reorientation dynamics of the nematic liquid crystal 5PCH.

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Richard Alan Palmer, Vasilis G. Gregoriou, Ross W. Jacobson, and James L. Chao "Dynamic FTIR spectroscopy of liquid crystals and polymer films", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166617

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