A Main-Chain de Vries Smectic Liquid Crystal Polymer Prepared by Hoveyda–Grubbs Catalyst Initiated Acyclic Diene Metathesis Polymerization
✍ Scribed by David M. Walba; Hong Yang; Patrick Keller; Chenhui Zhu; Renfan Shao; David A. Coleman; Christopher D. Jones; Noel A. Clark
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 444 KB
- Volume
- 30
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
A main‐chain liquid crystalline polymer has been obtained by applying a Hoveyda–Grubbs 2nd generation catalyst in acyclic diene metathesis polymerization (ADMET) of a monomer containing on one end a terminal dimethylvinylsilyl group and at the other end a terminal CC double bond. This material showed an interesting Iso‐de Vries SmA* – SmC* – Glass phase transition with a very small layer shrinkage on progressing from the SmA* phase into the SmC* phase. Will this material present a helical structure along the fiber axis in the SmC* temperature range? Several physical characterization methods including XRD, optical observation, and microtome technique have been used to investigate the internal structural organization in this liquid crystalline fiber.
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