WAXS studies of global molecular orientation induced in nematic liquid crystals by simple shear flowPople, J.A. and Mitchell, G.R. (1997) WAXS studies of global molecular orientation induced in nematic liquid crystals by simple shear flow. Liquid Crystals, 23 (4). pp. 467-473. ISSN 1366-5855 Full text not archived in this repository. It is advisable to refer to the publisher's version if you intend to cite from this work. See Guidance on citing. To link to this item DOI: 10.1080/026782997208046 Abstract/SummaryGlobal molecular orientation function coefficients for the nematic liquid crystal 4-cyano 4'-nn -pentylbiphenyl (5CB) in shear flow are presented, being extracted from 2-dimensional Wide-Angle X-ray Scattering data. A linear increase in orientation parameter P2 is observed with a logarithmic increase in shear rate. It is proposed that this arises from an increased number of LC directors aligning to the shear axis. Upon cessation of shear flow, the anisotropy is seen to relax away completely, over a time scale which is inversely proportional to the previously applied shear rate.
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