Cholesteric Textures of Aqueous Hydroxypropylcellulose Solutions
Author:
- 1 June 1995
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 266 (1) , 111-119
Abstract
Liquid crystalline textures exhibited by aqueous solutions of hydroxypropylcellulose were investigated by video-enhanced contrast polarized light microscopy. For the first time in this particular system, typical cholesteric structures, such as oily streaks and fingerprint lines, were resolved in close detail by light microscopy. Biphasic separation was observed even in samples of concentration well above the critical value generally accepted for mesophase formation at room temperature (∼40% wt). The dependence of the helical pitch on polymer concentration was also studied, by Fourier transforming images of the cholesteric textures.Keywords
This publication has 13 references indexed in Scilit:
- Freeze-Fractures in Cholesteric Mesophases of PolymersMolecular Crystals and Liquid Crystals Incorporating Nonlinear Optics, 1989
- Cholesteric hydroxypropylcellulose solutions: Microscopy and small‐angle light scatteringJournal of Polymer Science Part B: Polymer Physics, 1988
- The parabolic focal conic texture in a lyotropic liquid-crystalline polymerLiquid Crystals, 1986
- Cholesteric liquid crystalline phases given by three helical biological polymers : DNA, PBLG and xanthan. A comparative analysis of their texturesJournal de Physique, 1986
- Optical properties of hydroxypropyl cellulose liquid crystals. I. Cholesteric pitch and polymer concentrationMacromolecules, 1984
- Lyotropic mesophases of hydroxypropylcellulose in pure acetic acid, in water, and in mixed solventsJournal of Polymer Science: Polymer Chemistry Edition, 1984
- Ordered Phase Formation in Concentrated Hydroxpropylcellulose SolutionsMacromolecules, 1980
- Liquid Crystalline Structure In Aqueous Hydroxypropyl Cellulose SolutionsMolecular Crystals and Liquid Crystals, 1976
- Recherches sur les textures des états mésomorphes 4. La texture à plans et la morphogenèse des principales textures dans les cholestériquesJournal de Physique, 1973
- Recherches sur les textures des états mésomorphes - 2. — Les champs polygonaux dans les cholestériquesJournal de Physique, 1972