Determination of phase transition temperatures in thermotropic liquid crystals by modulated optical transmission and thermal lens spectroscopy
Abstract
The main phase-transition-temperatures of cholesteryl nonanoate, cholesteryl oleyl carbonate and their mixtures were determined by Differential Scanning Calorimetry; phase identification was performed by Polarizing Light Microscopy. The results were compared to the ones obtained by Modulated Optical Transmission and Thermal Lens Spectroscopy; this last technique also allowed the determination of the sample thermal diffusivity as a function of temperature.
- Publication:
-
Journal de Physique IV
- Pub Date:
- June 2005
- DOI:
- 10.1051/jp4:2005125050
- Bibcode:
- 2005JPhy4.125..213M