Preparation of LC monodomain structure in polymer systems

Seiji Ujiie; Yumi Yano; Akira Mori; Kazuyoshi Iimura

doi:10.1117/12.453298

12 December 2002 Preparation of LC monodomain structures in polymer systems

Seiji Ujiie, Yumi Yano, Akira Mori, Kazuyoshi Iimura

Proceedings Volume 4799, Liquid Crystals VI; (2002) https://doi.org/10.1117/12.453298
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

The thermal polymerization of aziridine monomers without a mesophase was performed in rubbing and non-treated sandwich cells. Cross-linked polymers, having homogeneous and homeotropic structures, were prepared. The thermal polymerization process was examined by X-ray diffraction measurements and polarizing microscopy. The cross-linked polymers exhibited a smectic A layered structure. In the rubbing sandwich cell, an aziridine monomer with an ethanol terminal group gave a cross-linked polymer having a homogeneous alignment. The homeotropic structure was obtained by thermal polymerization of an aziridine monomer with a nitro terminal group in a non-treated sandwich cell. The homeotropic structure was also formed on the surface of a glass plate and an aluminum thin film. A uniaxial-optical property of the homeotropic structure was characterized by conoscopic observation. The X-ray diffraction measurements showed the formation of the smectic A domain within an isotropic fluid by thermal polymerization at 100°C as well as optical texture observations. The X-ray diffraction pattern of the homeotropic structure was composed of first, second, and third inner reflections and a wide-angle halo, corresponding to the smectic A fluid phase.

Citation Download Citation

Seiji Ujiie, Yumi Yano, Akira Mori, and Kazuyoshi Iimura "Preparation of LC monodomain structures in polymer systems", Proc. SPIE 4799, Liquid Crystals VI, (12 December 2002); https://doi.org/10.1117/12.453298

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