| Issue |
Europhys. Lett.
Volume 52, Number 4, November II 2000
|
|
|---|---|---|
| Page(s) | 392 - 398 | |
| Section | Atomic and molecular physics | |
| DOI | https://doi.org/10.1209/epl/i2000-00451-1 | |
| Published online | 01 September 2002 | |
Equilibrium and shear-induced conformations of a side-chain liquid crystal polymer
Laboratoire Léon Brillouin (CEA-CNRS) - Saclay, F-91191
Gif-sur-Yvette, France
Received:
15
December
1999
Accepted:
15
September
2000
These studies delineate the conformations adopted by a side-chain liquid-crystalline polymer subjected to a steady-state shear flow as well as the corresponding me so pha se director orientations. Two distinct director orientations are identified in the nematic phase, giving evidence of a shear-induced transition from a flow-aligning to a non–flow-aligning behavior. This transition coincides, at rest, with a subtle change from prolate to oblate polymer main-chain conformation. In the smectic phase, the layers form multilayer cylinders oriented along the velocity axis.
PACS: 36.20.Ey – Macromolecules and polymer molecules: Conformation (statistics and dynamics) / 64.70.Md – Transitions in liquid crystals / 83.50.Ax – Steady shear flows
© EDP Sciences, 2000
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