High pressure studies of the static permittivity tensor components in the nematic phase of 6CB

The dielectric permittivity tensor components, ε II and ε ⊥ , in the nematic phase of 6CB (4-n-hexyl-4′-cyanobiphenyl) were measured in the pressure range 0.1-130 MPa and the temperature range 12-58°C. The dielectric anisotropy, Δε(p, V, T) = ε II - ε ⊥ , was analysed in isothermal, isobaric and iso...

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Bibliographic Details
Published in:Liquid crystals 2006-01, Vol.33 (1), p.85-89
Main Authors: Czub, Joanna, Urban, StanisŁaw, Würflinger, Albert
Format: Article
Language:English
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Summary:The dielectric permittivity tensor components, ε II and ε ⊥ , in the nematic phase of 6CB (4-n-hexyl-4′-cyanobiphenyl) were measured in the pressure range 0.1-130 MPa and the temperature range 12-58°C. The dielectric anisotropy, Δε(p, V, T) = ε II - ε ⊥ , was analysed in isothermal, isobaric and isochoric conditions taking into account the pVT data and the well known Maier and Meier equation. On that basis the nematic order parameter S(p, V, T) was determined. This was used to calculate the parameter Γ relating the interaction potential with the volume (density). Its value Γ = 4.1 agrees very well with other estimates.
ISSN:0267-8292
1366-5855
DOI:10.1080/02678290500362011