Solvent induced structural transitions in a liquid crystalline polyester
β Scribed by Maurizio Carotenuto; Liberata Guadagno; Vittoria Vittoria; Giancarlo Galli; Emo Chiellini
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 688 KB
- Volume
- 17
- Category
- Article
- ISSN
- 1022-1336
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β¦ Synopsis
Abstract
Quenched nematic films of a liquid crystalline polyester were crystallized either thermally or by solvent induced crystallization, and their structural organization was analyzed. All techniques show that the thermal crystallization transforms part of the nematic phase into a crystalline one, the remaining part leaving unchanged. By contrast, the solvent induced crystallization does transform a part of the nematic phase into a crystalline phase, leaving the residual part in a much more disordered state resembling the amorphous state.
π SIMILAR VOLUMES
The orientation relaxation behavior of a stretched side-chain liquid crystalline polymer (SCLCP) on a poly(vinyl alcohol) (PVA) film under strain was investigated through infrared dichroism at temperatures near its phase transitions. We found a reorientation of the aligned mesogens over the smectic
Furan and thiophene were used as probe molecules to study the solvent effects of liquid crystal (LC) solvents on the NMR determination of molecular structural parameters. It is shown that solvent effects in weakly aligned lyotropic liquid crystalline solvents and some thermotropic LCs are negligible