Optical Order Parameter of Dichroic Azo-Dyes in Liquid Crystalline Side-Chain Polysiloxanes |
| E. Chrzumnicka, D. Bauman Faculty of Technical Physics, Poznañ University of Technology, Nieszawska 13A, 60-965 Poznañ, Poland and J. Jad¿yn Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznañ, Poland |
| Received: June 6, 2002; revised version September 11, 2002 |
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| Polarized light absorption spectra of seven dichroic azo-dyes dissolved in mesogenic side-chain polysiloxanes were recorded as a function of temperature. On the basis of the spectra the optical order parameter of the dyes was determined. The influence of the dye on the phase transition temperatures of polysiloxanes was examined. The results obtained for polysiloxanes were compared with the data for low molecular weight liquid crystal. |
| DOI: 10.12693/APhysPolA.102.767 PACS numbers: 61.41.+e, 61.30.Gd, 64.70.Md |