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New Theory for Competing Interactions and Microstructures in Partially Ordered (Liquid-Crystalline) Phases

  • F. Dowell
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 27)

Summary

A summary of results from a unique statistical-physics theory to predict and explain competing interactions and resulting microstructures in some partially-ordered [in this case, liquid-crystalline (LC)] phases is presented. The static aspects of both partial orientational and partial positional ordering of the molecules into various microstructures in these phases (including the incommensurate smectic-Ad phase) can be understood in terms of various competing interactions (both entropic and energetic) involved in the packing together of the different molecular sub-units at given pressures and temperatures. These microstructures are predicted and explained (using no ad hoc or arbitrarily adjustable parameters) as a function of molecule chemical structure [including lengths and shapes (from bond lengths and angles), intramolecular rotations, site-site polarizabilities and pair potentials, dipole moments, etc.]. Theoretical results are presented for the nematic, re-entrant nematic, smectic-Ad, and smectic-Al LC phases and the isotropic liquid phase.

Keywords

Dipolar Force Rigid Core Molecular Site Intramolecular Rotation Oriented Molecule 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    The Molecular Physics of Liquid Crystals, ed. by G. R. Luckhurst and G. W. Gray (Academic, London, 1979); Phys. Today, 35 (5), (1982).Google Scholar
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    F. L. McCrackin : J. Chem. Phys. 69, 5419 (1978)ADSCrossRefGoogle Scholar
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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • F. Dowell
    • 1
  1. 1.Theoretical Division, Los Alamos National LaboratoryUniversity of CaliforniaLos AlamosUSA

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