Features of critical behavior of bend elastic constants of polymer liquid crystal near nematic-smectic A phase transition point

2000 ◽  
Author(s):  
Alexander P. Filippov ◽  
Vjacheslav V. Suev
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Elastic Constants ◽  
Critical Behavior ◽  
Transition Point ◽  
Phase Transition Point ◽  
Polymer Liquid ◽  
Smectic A ◽  
Smectic A Phase ◽  
Polymer Liquid Crystal

Chain flexibility and elastic constants of solutions of a polymer liquid crystal

1988 ◽  
Vol 3 (8) ◽  
pp. 1073-1086 ◽  
Author(s):  
R. Parthasarathy ◽  
Deborah J. Houpt ◽  
Donald B. Dupre
Keyword(s):  
Liquid Crystal ◽  
Elastic Constants ◽  
Chain Flexibility ◽  
Polymer Liquid ◽  
Polymer Liquid Crystal

scholarly journals Optical Microscopy Observations and Construction of Dupin Cyclides at the Isotropic/Smectic A Phase Transition

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4539
Author(s):  
Mikhael Halaby Macary ◽  
Gauthier Damême ◽  
Antoine Gibek ◽  
Valentin Dubuffet ◽  
Benoît Dupuy ◽  
...  
Keyword(s):  
Phase Transition ◽  
Numerical Simulation ◽  
Liquid Crystal ◽  
Optical Microscopy ◽  
Smectic A ◽  
Polarized Microscopy ◽  
Smectic A Phase ◽  
Dupin Cyclides

In this work, we are interested in the nucleation of bâtonnets at the Isotropic/Smectic A phase transition of 10CB liquid crystal. Very often, these bâtonnets are decorated with a large number of focal conics. We present here an example of a bâtonnet obtained by optical crossed polarized microscopy in a frequently observed particular area of the sample. This bâtonnet presents bulges and one of them consists of a tessellation of ellipses. These ellipses are two by two tangent, one to each other, and their confocal hyperbolas merge at the apex of the bâtonnet. We propose a numerical simulation with Python software to reproduce this tiling of ellipses as well as the shape of the smectic layers taking the well-known shape of Dupin cyclides within this particular bâtonnet area.

ANISOTROPY OF THE NEMATIC-SMECTIC A PHASE TRANSITION

1995 ◽  
Vol 09 (18n19) ◽  
pp. 2139-2155 ◽  
Author(s):  
BARBARA S. ANDERECK
Keyword(s):  
Phase Transition ◽  
Critical Behavior ◽  
Nematic Phase ◽  
Theoretical Work ◽  
Review Article ◽  
Superconducting Transition ◽  
Work Related ◽  
Smectic A ◽  
Smectic A Phase ◽  
Degree Of Anisotropy

Critical behavior at the transition from the nematic phase to the smectic A phase in liquid crystals has been of interest for over two decades. Discussions about the nature of the transition, its analogy to the superconducting transition, and the degree of anisotropy present in the critical exponents have been extensive during this time. This review article concentrates on the question of anisotropy at the nematic-smectic A transition. The experimental and theoretical work related to this question is summarized and compared. While progress has been made, there are many interesting questions related to this transition that remain for investigators to answer.

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