CORRELATION FACTORS IN THE NEMATIC AND ISOTROPIC-PHASE OF 4-N-OCTYL-4-CYANOBIPHENYL (8CB)

Authors
TSANGARIS GM
Citation
Gm. Tsangaris, CORRELATION FACTORS IN THE NEMATIC AND ISOTROPIC-PHASE OF 4-N-OCTYL-4-CYANOBIPHENYL (8CB), Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 237, 1993, pp. 163-173
Citations number
25
Categorie Soggetti
Crystallography
Journal title
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals → ACNP
ISSN journal
1058725X
Volume
237
Year of publication
1993
Pages
163 - 173
Database
ISI
SICI code
1058-725X(1993)237:<163:CFITNA>2.0.ZU;2-J
Abstract
Dielectric permittivity of 4-n-octyl-4-cyanobiphenyl (8CB) is measured by a shearing Couette cell in the nematic and isotropic phase. Correl ation factors are calculated according to Bordewijk and De Jeu for the nematic mesophases and according to Kirkwood for the isotropic liquid . Activation energy for the nematic reordering is measured dielectrica lly and the viscous activation energy is measured through the viscomet ric capability of the shearing cell. A potential barrier of 0.18 eV du e to close range intermolecular forces is then obtained.