Study of phase transitions of binary liquid crystalline mixtures

D. Ž Obadović, A. Vajda, M. Stančić, D. Lazar, K. Fodor Csorba, L. Bata

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

We present the results of study of binary mixtures of 4′-n-heptyloxyphenyl-4-n-octyloxy benzoate and 4′-(2-methylbutyl)phenyl 4-(n-heptylbiphenyl)carboxylate and 4′-n-pentylphenyl-4-(n-decyloxy)thiobenzoate. Phase diagrams of binary mixtures are formed on the basis of data obtained by the optical microscopy. It was established that the phase transition temperatures for binary mixtures are shifted significantly towards the direction of lower temperature ranges by 6-20 °C with respect to initial components. The mixtures exhibit nematic, smectic A, C, and B phases in a broader temperature range than that of the individual compounds. We have identified the presence of enantiotropic smectic G phase close to room temperature. X-ray diffraction data on non-oriented samples have enabled the characterization of the structure and calculation of the molecular parameters: the layer spacings (d) and the average intermolecular distances (D) in nematic, smectic A, C, B, and G phases.

Original languageEnglish
Pages (from-to)II/-
JournalMaterials Science Forum
Volume321
Publication statusPublished - Jan 1 2000
EventProceedings of the 1998 6th European Powder Diffraction Conference (EPDIC 6) - Budapest, Hung
Duration: Aug 22 1998Aug 25 1998

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Obadović, D. Ž., Vajda, A., Stančić, M., Lazar, D., Fodor Csorba, K., & Bata, L. (2000). Study of phase transitions of binary liquid crystalline mixtures. Materials Science Forum, 321, II/-.