Influence of molecular structure on phase transitions in liquid crystal binary mixtures: The role of the orientation of the central ester

2013 ◽  
Vol 183 ◽  
pp. 59-63 ◽  
Author(s):  
E. Levert ◽  
S. Lacelle ◽  
E. Zysman-Colman ◽  
A. Soldera
Keyword(s):  
Molecular Structure ◽  
Phase Transitions ◽  
Liquid Crystal ◽  
Binary Mixtures

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

Effect of the liquid crystal solute on the rotator phase transitions of n-alkanes

RSC Advances ◽  
2015 ◽  
Vol 5 (16) ◽  
pp. 12168-12177 ◽  
Author(s):  
Prabir K. Mukherjee
Keyword(s):  
Phase Transitions ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Binary Mixtures ◽  
Experimental Studies ◽  
Rotator Phase

Recent experimental studies have shown that the liquid crystal substance plays an important role in determining the structures and the phase transitions of the different rotator phases in binary mixtures of n-alkane and liquid crystals.

scholarly journals Polymer–Nematic Liquid Crystal Interface: On the Role of the Liquid Crystalline Molecular Structure and the Phase Sequence in Photoalignment

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 193
Author(s):  
Ameer R. K. Nassrah ◽  
István Jánossy ◽  
Viktor Kenderesi ◽  
Tibor Tóth-Katona
Keyword(s):  
Molecular Structure ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Conformational Changes ◽  
Liquid Crystalline ◽  
Three Dimensions ◽  
Phase Sequence ◽  
Photosensitive Polymer ◽  
Experimental Findings

We provide experimental evidence for the influence of the molecular structure of the nematic liquid crystal (NLC) on the photoalignment process in three dimensions at the interface with a polymer layer. In particular, the experimental findings are explained through the presence (or absence) of the π−π aromatic interactions between the NLC and the polymer. The influence of the nematic-to-smectic A phase transition on the photocontrol is also addressed. Furthermore, we demonstrate that the photo-induced reorientation scenarios can be eventually connected to conformational changes in the photosensitive polymer.

On the Role of Marangoni Effects on the Critical Heat Flux for Pool Boiling of Binary Mixtures

1996 ◽  
Vol 118 (1) ◽  
pp. 103-109 ◽  
Author(s):  
W. R. McGillis ◽  
V. P. Carey
Keyword(s):  
Surface Tension ◽  
Heat Flux ◽  
Binary Mixtures ◽  
Critical Heat Flux ◽  
Full Range ◽  
Pool Boiling ◽  
Marangoni Effect ◽  
Restoring Force ◽  
Marangoni Effects

The Marangoni effect on the critical heat flux (CHF) condition in pool boiling of binary mixtures has been identified and its effect has been quantitatively estimated with a modified model derived from hydrodynamics. The physical process of CHF in binary mixtures, and models used to describe it, are examined in the light of recent experimental evidence, accurate mixture properties, and phase equilibrium revealing a correlation to surface tension gradients and volatility. A correlation is developed from a heuristic model including the additional liquid restoring force caused by surface tension gradients. The CHF condition was determined experimentally for saturated methanol/water, 2-propanol/water, and ethylene glycol/water mixtures, over the full range of concentrations, and compared to the model. The evidence in this study demonstrates that in a mixture with large differences in surface tension, there is an additional hydrodynamic restoring force affecting the CHF condition.

scholarly journals Electric properties of olive oil under pressure

2021 ◽  
Author(s):  
L. T. Pawlicki ◽  
R. M. Siegoczyński ◽  
S. Ptasznik ◽  
K. Marszałek
Keyword(s):  
Molecular Structure ◽  
Phase Transition ◽  
Phase Diagram ◽  
Phase Transitions ◽  
Olive Oil ◽  
Material Parameters ◽  
First Order ◽  
Long Time ◽  
Capacitive Reactance ◽  
First Order Phase

AbstractThe main purpose of the experiment was a thermodynamic research with use of the electric methods chosen. The substance examined was olive oil. The paper presents the resistance, capacitive reactance, relative permittivity and resistivity of olive. Compression was applied with two mean velocities up to 450 MPa. The results were shown as functions of pressure and time and depicted on the impedance phase diagram. The three first order phase transitions have been detected. All the changes in material parameters were observed during phase transitions. The material parameters measured turned out to be the much more sensitive long-time phase transition factors than temperature. The values of material parameters and their dependence on pressure and time were compared with the molecular structure, arrangement of molecules and interactions between them. Knowledge about olive oil parameters change with pressure and its phase transitions is very important for olive oil production and conservation.

Sign in / Sign up

Export Citation Format

Share Document