Mechanical model study of relationship of molecular configuration and multiphase in liquid crystal materials
Ma Heng (马恒)a, Sun Rui-Zhi (孙瑞芝)a, Li Zhen-Xin (李振新)b
a College of Physics & Engineering Information, Henan Normal University, Xinxiang 453007, China; b Biomedical Materials and Engineering Centre, Wuhan University of Technology, Wuhan 430070, China
Abstract A mechanical model of liquid crystals (LCs) is applied to study the polymorphism of homologous series of terphenyl compounds. With a semi-experimental molecular orbit method, we calculate the moment of inertia which represents the rotation state to describe the phase transition temperature obtained from experimental data. We propose a novel explanation of the phase sequence or polymorphism of LC materials using the two key parameters, the moment of inertia and critical rotational velocity. The effect of molecular polarity on the appearance of liquid crystalline is also discussed.
Received: 20 December 2005
Revised: 30 December 2005
Accepted manuscript online:
PACS:
61.30.Cz
(Molecular and microscopic models and theories of liquid crystal structure)
Fund: Project supported by the Henan Innovation Project for University Prominent Research Talents, China
(Grant No 2006KYCX002).
Cite this article:
Ma Heng (马恒), Sun Rui-Zhi (孙瑞芝), Li Zhen-Xin (李振新) Mechanical model study of relationship of molecular configuration and multiphase in liquid crystal materials 2006 Chinese Physics 15 1009
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