The Effect of Molecular Structure on Liquid Crystal Properties in Binary Mixtures

2001 ◽  
Vol 30 (4) ◽  
pp. 330-331 ◽  
Author(s):  
Jianwei Wu ◽  
Hiroaki Okamoto ◽  
Shunsuke Takenaka
Keyword(s):  
Molecular Structure ◽  
Liquid Crystal ◽  
Binary Mixtures ◽  
Crystal Properties

Synthesis and Study of 4'-Acyl-4-Biphenylol Esters

1996 ◽  
Vol 425 ◽  
Author(s):  
Wan-Fang Lu ◽  
Zhi-Yong Zhang ◽  
Hui Ding ◽  
Yao-Zeng Shi
Keyword(s):  
Molecular Structure ◽  
Liquid Crystal ◽  
Transition Temperature ◽  
Chiral Carbon ◽  
Crystal Properties ◽  
Temperature Ranges ◽  
Mesomorphic Properties

AbstractEight new 4'-acyl-4-biphenylol esters 5a∼h were synthesized and their mesomorphic properties were tested by PM and DSC. These compounds have wider mesomorphic transition temperature ranges and higher clearing points. The compound 5g in which there is no chiral carbon exhibits a stripped focal conic texture in its Sc mesophase. The effect of the molecular structure on the liquid crystal properties was discussed.

scholarly journals Vertical Orientation of Liquid Crystal on 4-n-Alkyloxyphenoxymethyl-Substituted Polystyrene Containing Liquid Crystal Precursor

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 736
Author(s):  
Kyutae Seo ◽  
Hyo Kang
Keyword(s):  
Molecular Structure ◽  
Liquid Crystal ◽  
Surface Energy ◽  
Polymer Films ◽  
Ultraviolet Irradiation ◽  
Molar Fraction ◽  
Side Chain ◽  
Polymer Modification ◽  
Vertical Orientation ◽  
Surface Energies

We synthesized a series of polystyrene derivatives that were modified with precursors of liquid crystal (LC) molecules, such as 4-ethyloxyphenol (homopolymer PEOP and copolymer PEOP#; # = 20, 40, 60, and 80, where # indicates the molar fraction of 4-ethyloxyphenoxymethyl in the side chain), 4-n-butyloxyphenol (PBOP), 4-n-hexyloxyphenol (PHOP), and 4-n-octyloxyphenol (POOP), via polymer modification reaction to investigate the orientation of LC molecules on polymer films, exhibiting part of the LC molecular structure. LC molecules showed a stable and uniform vertical orientation in LC cells fabricated with polymers that have 4-ethyloxyphenoxymethyl in the range of 40–100 mol%. In addition, similar results were obtained in LC cells fabricated with homopolymers of PEOP, PBOP, PHOP, and POOP. The vertical orientation of LC molecules in LC cells fabricated with polymer films correlated to the surface energy of polymer films. For example, vertical LC orientation was observed when the total surface energies of the polymer films were lower than approximately 43.2 mJ/m2. Good alignment stabilities were observed at 150 °C and 20 J/cm2 of ultraviolet irradiation for LC cells fabricated with PEOP film.

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