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1 September 2004 Linear and crosslinked silicon based liquid crystalline materials
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Proceedings Volume 5565, XV Conference on Liquid Crystals; (2004) https://doi.org/10.1117/12.581208
Event: XV Conference on Liquid Crystals, 2003, Zakopane, Poland
Abstract
In this paper the effect of steric hindrance, crosslinking and the use of multipode mesogenic moieties is presented as a part of studies directed on the architectural modification of silicon containing SLCP's. Trist(trimethylsilyl)methyl(trisyl) groups have been attached to liquid crystalline comb-like polysiloxanes by hydrosilylation reaction in order to increase their thermal stability. It was found that attaching trisyl group to 10% of monomeric units led to a decrease in mass loss at 330°C by a factor of 2. The thermo-optical studies of linear and crosslinked LC polycarbosilanes exhibiting SmC* phase proved that crosslinking stabilizes the generated mesophases, especially during isotropisation process. The new synthetic route for polysiloxanes with pendant "triple-fork" mesogenes has been developed. It was found that such the structures are able to generate stable mesophases even if their molecular mass is relatively low.
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Tomasz Ganicz "Linear and crosslinked silicon based liquid crystalline materials", Proc. SPIE 5565, XV Conference on Liquid Crystals, (1 September 2004); https://doi.org/10.1117/12.581208
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