Structure of side chain liquid crystalline poly(silylenemethylene)s

Soo Young Park, Tao Zang, L. V. Interrante, B. L. Farmer

Research output: Contribution to journalConference articlepeer-review

Abstract

The structure of side chain liquid crystal of polycarbosilane (-(SiCH3R-CH2)n-:R = O(CH2)11O-Ph-Ph) was studied by X-ray diffraction methods. Four different structures were observed in fiber and powder X-ray diffraction patterns during heating experiments. The room temperature fiber pattern from a sample drawn from isotropic state shows a series of small angle equatorial reflections and a sharp, strong wide angle meridional reflection at 4.4 angstroms, suggesting a SB phase with layer thickness 30 angstroms and hexagonal packing of the mesogenic side chains perpendicular to the main chain. The asimuthally broad wide angle reflection suggests considerable tilt with respect to the fiber axis.

Original languageEnglish
Pages (from-to)611-612
Number of pages2
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Volume41
Issue number1
StatePublished - Mar 2000
EventThe San Francisco Meeting - San Francisco, CA, USA
Duration: 26 Mar 200031 Mar 2000

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