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Elastic Constants and Orientational Viscosities of a Bent-Core Nematic Liquid Crystal
Physical Review E
  • Madhabi Majumdar
  • Peter Salamon
  • Antal Jákli, Kent State University - Kent Campus
  • Jim T. Gleeson
  • Samuel N. Sprunt
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Using a combination of dynamic light scattering and Freedericksz transitions induced in applied magnetic and electric fields, we have determined the absolute magnitudes of the Frank elastic constants and effective orientational viscosities of the bent-core nematic liquid crystal, 4-chloro-1,3-phenylene bis 4-[4'-(9-decenyloxy)benzoyloxy] benzoate. At a fixed temperature 2 degrees C below the isotropic-nematic transition, we find K(11) = 3.1 x 10(-12) N, K(22) = 0.31 x 10(-12) N, K(33) = 0.88 x 10(-12) N, eta(splay) = 1.1 Pa s, eta(twist) = 0.37 Pa s, and eta(bend) = 1.2 Pa s. The unusual anisotropies of these parameters are discussed in terms of short-range, smectic-C-like correlations among molecules in the nematic phase.
Copyright 2011 American Physical Society. Available on publisher's site at
Citation Information
Madhabi Majumdar, Peter Salamon, Antal Jákli, Jim T. Gleeson, et al.. "Elastic Constants and Orientational Viscosities of a Bent-Core Nematic Liquid Crystal" Physical Review E Vol. 83 Iss. 3 (2011)
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