Published March 21, 2003
| Published
Journal Article
Open
Shear Alignment Behavior of Nematic Solutions Induced by Ultralong Side-Group Liquid Crystal Polymers
- Creators
- Kempe, M. D.
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Kornfield, J. A.
Chicago
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Abstract
Addition of a low concentration of a very long (430 kg/mol) side group liquid crystal polymer is shown to produce dramatic changes in the flow characteristics of a calamitic nematic liquid crystal. This polymer causes a typical flow-aligning nematic liquid crystal to align near the velocity gradient direction rather than near the velocity direction, corresponding to having a tumbling parameter lambda<–1, for concentrations greater than 7.5% polymer. Such flow-aligning behavior has not been reported previously in a calamitic nematic. The large molecular weight of the present polymer relative to those examined in the prior literature is responsible for these new phenomena.
Additional Information
© 2003 The American Physical Society (Received 10 October 2002; published 17 March 2003) We thank Chris Ober and Jagdish Jethalamari for help with synthesis, Weijun Zhou for help with instrumentation, and AFOSR LC-MURI for funding for this project.Attached Files
Published - KEMprl03.pdf
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Additional details
- Eprint ID
- 1709
- Resolver ID
- CaltechAUTHORS:KEMprl03
- Air Force Office of Scientific Research (AFOSR)
- Created
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2006-02-13Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field