Guest Effect on Nematic-Isotropic Phase Transition Temperature of Liquid Crystal 6CHBT |
| D. Bauman, J. Solczyński and E. Chrzumnicka Institute of Physics, Poznań University of Technology, Piotrowo 3, 60-965 Poznań, Poland |
| Received: May 13, 1997; in final form August 1, 1997 |
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| The polarized absorption spectra of seven dichroic azo dyes dissolved in the nematogenic liquid crystal host 6CHBT have been recorded as a function of temperature. On the basis of these spectra, the guest order parameter has been determined. Moreover, the influence of the dye addition on the behaviour of the guest-host mixture in the vicinity of the nematic- isotropic phase transition has been examined. The experimental results have been compared in some details with the calculations done on the basis of the mean field theory for binary mixtures. |
| DOI: 10.12693/APhysPolA.92.1151 PACS numbers: 61.30.Gd, 64.70.Md |