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 language | English |
---|---|
Pages (from-to) | 611-612 |
Number of pages | 2 |
Journal | American Chemical Society, Polymer Preprints, Division of Polymer Chemistry |
Volume | 41 |
Issue number | 1 |
State | Published - Mar 2000 |
Event | The San Francisco Meeting - San Francisco, CA, USA Duration: 26 Mar 2000 → 31 Mar 2000 |