Formation of anisotropic polymer blend by photopolymerization of lyotropic LC-phase

Piotr Wojciechowski; J. Ulanski; Marian Kryszewski; Lidia Okrasa; Wojciech Czajkowski

doi:10.1117/12.215551

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2 August 1995 Formation of anisotropic polymer blend by photopolymerization of lyotropic LC-phase

Piotr Wojciechowski, J. Ulanski, Marian Kryszewski, Lidia Okrasa, Wojciech Czajkowski

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Proceedings Volume 2372, Liquid Crystals: Materials Science and Applications; (1995) https://doi.org/10.1117/12.215551
Event: Liquid Crystals: Materials Science and Applications, 1994, Zakopane, Poland

Abstract

The structural characteristics are given for the polymer blend (PB) prepared by photopolymerization of the uniaxially oriented liquid crystal (LC)-phase of the hydroxypropylcellulose-acrylic acid (HPC-AA) system. The uniaxially oriented films of HPC- AA mesophase show a so-called banded structure under cross polarizers, characteristic for uniaxially oriented LC-polymer films. The state of order of HPC-AA mesophase was investigated by effect of dye orientation in LC-media. The influence of the length of the cholesteric pitch of HPC-AA on the order parameter of dye was found. The polymer blend as a product of the photopolymerization of AA in the lyotropic and uniaxially oriented medium HPC-AA is a birefringent solid system, was strongly affected by crosslinking processes. The PB has a LC-organization up to thermal decomposition at 230 degrees C, as shown by TOA and microscopic observations. The PB can be regarded as a new kind of the thermally resistant LC-polymer network.

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Piotr Wojciechowski, J. Ulanski, Marian Kryszewski, Lidia Okrasa, and Wojciech Czajkowski "Formation of anisotropic polymer blend by photopolymerization of lyotropic LC-phase", Proc. SPIE 2372, Liquid Crystals: Materials Science and Applications, (2 August 1995); https://doi.org/10.1117/12.215551

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