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Behaviour of a cholesteric solution of poly-γ-butyl-L-glutamate in an electric field

Authors
Journal
Polymer Science U S S R
0032-3950
Publisher
Elsevier
Publication Date
Volume
28
Issue
8
Identifiers
DOI: 10.1016/0032-3950(86)90395-3

Abstract

Abstract The electrotrophic cholesteric-nematic phase transition and the appearance of electrodynamic instability in the form of domains is studied by optical polarization microscopy and small-angle polarized light scattering in a lyotropic cholesteric polymer. From the morphology point of view the stages of texture relaxation and subsequent untwisting of the cholesteric structure into the nematic structure, the process is a detailed analogue of the same magnetotropic transition. In fields close to the critical, during this transition there is a strong increase in the dispersion of the spacing of the cholesteric structure, which, it is suggested, should be taken into account in the model for the untwisting of this structure. The observed electrohydrodynamic instability is assumed to appear as a result of traces of the cholesteric structure in the nematic phase.

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