| Issue |
Europhys. Lett.
Volume 43, Number 3, August I 1998
|
|
|---|---|---|
| Page(s) | 296 - 301 | |
| Section | Condensed matter: structure, thermal and mechanical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00355-6 | |
| Published online | 01 September 2002 | |
Orientational behaviour of thermotropic and lyotropic liquid crystal polymer systems under shear flow
Polymer Science Centre, JJ Thomson Physical Laboratory, University of Reading, Whiteknights, Reading, RG6 6AF, UK
Received:
22
December
1997
Accepted:
17
June
1998
A comparison is made of the development of global orientation
during shearing of lyotropic solutions of
hydroxypropylcellulose with that observed for the
thermotropic phase of hydroxypropylcellulose.
At shear rates 
the behaviour of the
two systems is similar, both during steady-state shear,
and in terms of relaxation following cessation of shear flow.
At low shear rates, the levels of orientation observed for the
thermotropic system are substantially greater than observed for the
lyotropic solutions.
The relationship of these differences to variations in molecular parameters,
viscous stress and to director tumbling is discussed.
PACS: 61.41.+e – Polymers, elastomers, and plastics / 83.50.Ax – Steady shear flows / 61.30.Gd – Orientational order of liquid crystals; electric and magnetic field effects on order
© EDP Sciences, 1998
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.