POLY 341 |
| The use of triptycene to create unique arrangements of solutes in liquid crystal solutions will be presented. Molecules defining free volume were shown to exhibit contra-aspect ratio alignment in stretched polymers and solution. The unique orientations were the result of the preference of the materials to fill space completely to avoid free volume. Similar principles were used to create stable solutions of conjugated poly(phenylene vinylene)s and poly(phenylene ethynylene)s in nematic liquid crystals. The polymers all contain triptycene unites fused into their backbone to obtain the high solubility needed to maintain solubility in complex liquid crystalline media. Polymer networks can be used to enforce alignments in liquid crystals and the utility of these effects to produce higher performance liquid crystal devices will be discussed. |
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Polymers and Liquid Crystals
8:30 AM-12:00 PM, Tuesday, August 21, 2007 Westin Boston Waterfront -- Otis, Oral
Division of Polymer Chemistry |