In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 39, No. 4R ( 2000-04-01), p. 1801-
Abstract:
Liquid crystal phase stability is examined for liquid crystal terphenyls and their fluorinated derivatives, and some general rules are proposed that relate phase stability to molecular structures. A mechanical model is applied to explain the phase behaviours of these compounds. We postulate that liquid crystal phases are micromachine systems consisting of an ensemble of molecular rotors. The molecular core and terminals are the rotor and axes, respectively. The terminals also function as bearings for the subsequent layer's molecular rotors. Phenomena of the thermal stability of phase and polymorphism are interpreted in terms of basic mechanical and dynamical parameters: centre of gravity, eccentricity, moment of inertia and mass distribution. The importance of dynamic impedance matching between parts, rotors, axes and bearings, is emphasized. Fluorination effects on liquid crystallinity are explained in a unified manner on a mechanical and dynamical basis.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.39.1801
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2000
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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