The Frank constants of nematic 5CB at atmospheric pressure

Measurements of the « splay » and « bend » constants for nematic 4'-n-pentyl-4-cyanobiphenyl are described. The method used was a conventional one, but particular care was taken to ensure reproducible and reliable results. The results are compared with those of previous authors and with predictions based on the mean field theory of Priest [7] and the continuum theory of Faber [10].

[1]  S. Lagerwall,et al.  Measurements of Hydrodynamic Parameters for Nematic 5CB , 1980 .

[2]  R. Horn.  High pressure measurements of the refractive indices of two nematic liquid crystals , 1978 .

[3]  Heinz J. Deuling,et al.  Deformation of Nematic Liquid Crystals in an Electric Field , 1972 .

[4]  A. M. J. Spruijt,et al.  The Determination of the Elastic Constants of Nematic Liquid Crystals , 1976 .

[5]  Raman depolarization ratios and order parameters of a nematic liquid crystal , 1978 .

[6]  N. V. Madhusudana,et al.  Elastic and Optical Properties of Some 4′-n-Alkyl-4-Cyanobiphenyls , 1976 .

[7]  Richard G. Priest,et al.  Theory of the Frank Elastic Constants of Nematic Liquid Crystals , 1973 .

[8]  I. Haller.  Thermodynamic and static properties of liquid crystals , 1975 .

[9]  J. Nehring,et al.  On the Elastic Theory of Uniaxial Liquid Crystals , 1971 .

[10]  E. P. Raynes,et al.  Voltage Dependence of the Capacitance of a Twisted Nematic Liquid Crystal Layer , 1979 .

[11]  N. V. Madhusudana,et al.  Elasticity and Orientational Order in Some 4′-n-Alkyl-4-Cyanobiphenyls: Part II , 1977 .

[12]  T. Faber.  A continuum theory of disorder in nematic liquid crystals. I , 1977, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[13]  W. H. Jeu,et al.  The elastic constants of nematic liquid crystalline terminally substituted azoxybenzenes , 1977 .

[14]  A. Pippard,et al.  A continuum theory of disorder in nematic liquid crystals IV. Application to lattice models+ , 1980, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[15]  R. Horn,et al.  Refractive indices and order parameters of two liquid crystals , 1978 .

[16]  T. Faber,et al.  The surface tension of nematic liquid crystals , 1978 .

[17]  R. Horn,et al.  Molecular alignment in nematic liquid crystals: a comparison between the results of experiments at high pressure and predictions based on mean field theories , 1979, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences.

[18]  C. Maze.  Determination of Nematic Liquid Crystal Elastic and Dielectric Properties from the Shape of a Capacitance-Voltage Curve , 1978 .