Mean-Field Theory of Photoinduced Molecular Reorientation in Azobenzene Liquid Crystalline Side-Chain Polymers

1997 ◽  
Vol 79 (13) ◽  
pp. 2470-2473 ◽  
Author(s):  
Thomas Garm Pedersen ◽  
Per Michael Johansen
Keyword(s):  
Field Theory ◽  
Liquid Crystalline ◽  
Mean Field Theory ◽  
Mean Field ◽  
Side Chain ◽  
Molecular Reorientation

Mean-field theory of optical storage in liquid crystalline side-chain polymers

1998 ◽  
Vol 9 (1-4) ◽  
pp. 212-215 ◽  
Author(s):  
Thomas Garm Pedersen ◽  
Per Michael Johansen
Keyword(s):  
Field Theory ◽  
Liquid Crystalline ◽  
Mean Field Theory ◽  
Mean Field ◽  
Optical Storage ◽  
Side Chain

Critical point in a random side-chain nematic copolymer: Mean-field theory

1989 ◽  
Vol 4 (5) ◽  
pp. 477-481 ◽  
Author(s):  
Deng-Ke Yang ◽  
Chester A. Vause
Keyword(s):  
Field Theory ◽  
Critical Point ◽  
Mean Field Theory ◽  
Mean Field ◽  
Side Chain

Molecular Polarizabilities and Orientational Ordering of Two Mesogens

1991 ◽  
Vol 46 (10) ◽  
pp. 858-864 ◽  
Author(s):  
M. Mitra ◽  
S. Paul ◽  
R. Paul
Keyword(s):  
Field Theory ◽  
Liquid Crystalline ◽  
Mean Field Theory ◽  
Orientational Order ◽  
Mean Field ◽  
Continuum Theory ◽  
Order Parameters ◽  
Liquid Phases ◽  
Molecular Polarizabilities ◽  
The Mean

AbstractThe refractive indices (no, ne) and densities of two mesogens have been measured in their liquid crystalline and liquid phases. The molecular polarizabilities (xo, xe) were evaluated by Vuks' and Neugebauer's relations. The polarizabilities thus obtained are compared with those estimated from the bond polarizabilities, and the orientational order parameters, <P2>, are compared with the mean field theory of Maier and Saupe, the modified mean field theory of Humphries, James and Luckhurst. and the continuum theory suggested by T. E. Faber. We have also calculated the three order parameters (<P2), τ, σ) describing the smectic A phase following McMillan's model. Possible causes of the discrepancy are discussed.

Mean-Field Theory of Photoinduced Formation of Surface Reliefs in Side-Chain Azobenzene Polymers

1998 ◽  
Vol 80 (1) ◽  
pp. 89-92 ◽  
Author(s):  
Thomas Garm Pedersen ◽  
Per Michael Johansen ◽  
Niels Christian Rømer Holme ◽  
P. S. Ramanujam ◽  
Søren Hvilsted
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Side Chain

Concentration Dependence of Polarization for the AC* Phase Transition in a Binary Mixture of Liquid Crystals

1998 ◽  
Vol 12 (20) ◽  
pp. 2083-2090 ◽  
Author(s):  
S Salihoğlu ◽  
H. Yurtseven ◽  
B. Bumin
Keyword(s):  
Field Theory ◽  
Phase Transition ◽  
Binary Mixture ◽  
Liquid Crystalline ◽  
Mean Field Theory ◽  
Mean Field ◽  
Crystalline Material ◽  
Coupling Term ◽  
Liquid Crystalline Material ◽  
Good Agreement

Using mean-field theory with P2θ2 coupling term in the free energy expansion, we calculate the polarization as a function of concentration for the AC* phase transition in a binary mixture of C7 and 10.O.4 liquid crystalline material. Our calculated values of polarization are in good agreement with the experimental data.

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