28 June 2001 Use of polyacrylonitrile as promising material for matrix of liquid crystal composite
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Proceedings Volume 4511, Advanced Display Technologies: Basic Studies of Problems in Information Display (FLOWERS 2000); (2001) https://doi.org/10.1117/12.431273
Event: Advanced Display Technologies: Basic Studies of Problems in Information Display (FLOWERS'2000), 2000, Moscow, Russian Federation
Abstract
Liquid crystal composites consisting of high porous polymeric matrices based on polyacrylonitrile filled with liquid crystal compounds MBBA, cholesteryl oleyl carbonate and a commercial mixture of ZhK-1282 were prepared and studied. Obtained LC-composites strongly scatter visible light at room temperature, when the LC is in the mesophase, but when the LC is in the isotropic phase the samples are transparent. It is shown by differential scanning calorimetry and optical polarizing microscopy that it is possible to change the temperature interval of existence of the mesophase by varying the size of pores in a PAN matrix. The electro-optical researches have shown that the reorientation of MBBA in composites does not occur in a wide interval of frequencies and voltage irrespective of the sizes of pores. The similar researches have shown that X-16 in composites also is not exposed to action of electric field. The electro-optical researches of samples with ZhK- 1282 have shown that the electrical field does not render influence on LC in matrix with small pores, while in samples with large pores the reorientation of a part of the LC is appreciable.
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V. I. Mashchenko, V. I. Mashchenko, A. V. Goponenko, A. V. Goponenko, C. A. Udra, C. A. Udra, A. M. Filyakin, A. M. Filyakin, V. I. Gerasimov, V. I. Gerasimov, } "Use of polyacrylonitrile as promising material for matrix of liquid crystal composite", Proc. SPIE 4511, Advanced Display Technologies: Basic Studies of Problems in Information Display (FLOWERS 2000), (28 June 2001); doi: 10.1117/12.431273; https://doi.org/10.1117/12.431273
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