Optical and DSC Studies on Pure Nematogenic Materials Exhibiting Re-Entrant Isotropic Phase

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Journal Title, Volume, Page: 
Actaphysica Vol. A69
Year of Publication: 
Abdoh, M. M. M.
Current Affiliation: 
Department of Physics, Faculty of Science, An-Najah National University, Nablus, Palestine
Shashidhara Prasad, J.
Venkataramana Shastry, C. I.
Preferred Abstract (Original): 

Refractive indexes and densities of 4-propylphenyl trans-4-propylcyclohexyl-4-benzoate (TPCB) and trans-4-pentyl-(4'-cyanobiphenylyl-4)-cyclohexane (TPCC) are reported as functions of temp. in nematic re-entrant isotropic and isotropic phases. Mol. polarizabilities were evaluated by using Lippincott-δ-function potential model and order parameters evaluated by using an anisotropic internal field model Neugebauer approach). The sequences of phase transitions was confirmed by differential scanning calorimetric (DSC) studies. [on SciFinder(R)]