X-ray diffraction study of the mesomorphism of some side chain cyclosiloxanes and polycarbosilanes

Irma Sledzinska; Tomasz Ganicz; Jan Przedmojski; Joanna Soltysiak; Wlodzimierz A. Stanczyk

doi:10.1117/12.215539

2 August 1995 X-ray diffraction study of the mesomorphism of some side chain cyclosiloxanes and polycarbosilanes

Irma Sledzinska, Tomasz Ganicz, Jan Przedmojski, Joanna Soltysiak, Wlodzimierz A. Stanczyk

Proceedings Volume 2372, Liquid Crystals: Materials Science and Applications; (1995) https://doi.org/10.1117/12.215539
Event: Liquid Crystals: Materials Science and Applications, 1994, Zakopane, Poland

Abstract

An influence of a flexible spacer length on a formation of mesomorphic phases in two classes of organosilicon polymers with different backbones but the same mesogenic rigid core has been investigated by x-ray diffraction measurements completed by differential scanning calorimetry and optical microscopy. Depending on the spacer length, these materials form nematic and/or smectic A₁ phases. The nematic phase with smectic C-like short range ordering was observed for the cyclosiloxanes. The dependence of the layer spacing in the smectic phase on the siloxane ring size was also investigated.

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Irma Sledzinska, Tomasz Ganicz, Jan Przedmojski, Joanna Soltysiak, and Wlodzimierz A. Stanczyk "X-ray diffraction study of the mesomorphism of some side chain cyclosiloxanes and polycarbosilanes", Proc. SPIE 2372, Liquid Crystals: Materials Science and Applications, (2 August 1995); https://doi.org/10.1117/12.215539

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