Determination of thermodynamic properties and phase transition temperatures of phenylbenzoate-based calamitic liquid crystals by inverse gas chromatography method

Cakar A., ÇAKAR F., OCAK H., Karavelioglu S., BİLGİN ERAN B., CANKURTARAN Ö.

Phase Transitions, cilt.96, sa.11-12, ss.731-745, 2023 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 96 Sayı: 11-12
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1080/01411594.2023.2272018
  • Dergi Adı: Phase Transitions
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.731-745
  • Anahtar Kelimeler: Inverse gas chromatography, Liquid crystal, phase transition temperature, thermodynamic properties
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In this study, Phenylbenzoate-based calamitic liquid crystals (LCs) were synthesized and characterized, and then the thermodynamic properties and phase transition temperatures were investigated by inverse gas chromatography (IGC) at infinite dilution. The phase transition temperatures of the LCs were determined in the range of 40–170°C by the IGC method. Finally, in the thermodynamic equilibrium region (the range of 160–200°C), Flory-Huggins theory and the equation of state theory with the LC-solvent interaction parameters, the effective exchange energy parameters, the weight fraction activity coefficient, and also the partial molar heat of mixing at infinite dilution of solvent, the molar heat of vaporization of solvent, and the partial molar heat of sorption of solvent were calculated.