Optical-activity anisotropy of ordered phases in cellulose acetates View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2009-07

AUTHORS

A. B. Shipovskaya, S. L. Shmakov, O. F. Kazmicheva, S. Yu. Shchegolev

ABSTRACT

The optical activity of anisotropic solutions of cellulose diacetate in nitromethane and dimethyl sulfoxide and of diand triacetate films with vitrified ordered structure has been studied. The systems under study are characterized by high specific optical rotation [α], suggesting formation of a cholesteric mesophase. The value of [α] is found to depend on the angle of rotation of the samples relative to the direction of the polarization vector of an incident light beam in the plane perpendicular to this beam (the anisotropy of optical activity). This dependence (indicatrix) shows an irregular pattern and, when plotted in Cartesian coordinates, can be described with a distorted sinusoid. The data on the resolution of indicatrices into harmonic constituents and isolation of contributions due to isotropic components and anisotropic components, each of which is determined by the structural element with the corresponding asymmetry, are analyzed. More... »

PAGES

773-784

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1134/s0965545x09070049

DOI

http://dx.doi.org/10.1134/s0965545x09070049

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1009228315


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