Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.362, 279-288, 2001
Order and mobility of the fluorescent probe 1,6-diphenylhexatriene in a polyester liquid crystal polymer
We have employed time dependent fluorescence polarization to investigate a main chain semiflexible polyester type liquid crystal polymer using the fluorescent probe 1,6-diphenylhexatriene. We have obtained the second rank order parameter and the tumbling reorientational time of the probe as a function of temperature. We have found the polymer disordering to occur in a temperature range very close to the nematic-isotropic transition.