Dielectric Properties of 4-Cyano-4 '-pentylbiphenyl (5CB): 4-[4-(S)-2-Methylbutoxybenzoyloxy]benzoic Acid (BAC) Composite

Canlı N., Ozdemır Z., Okutan M., Guzeller D., Ocak H., Eran B.

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, cilt.623, sa.1, ss.17-30, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 623 Sayı: 1
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1080/15421406.2014.990753
  • Dergi Adı: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.17-30
  • Anahtar Kelimeler: 4-[4-(S)-2-Methylbutoxybenzoyloxy]benzoic acid, 4-cyano-4 '-pentylbiphenyl, absorption coefficient, dielectric strength, liquid crystal, relaxation mechanism, LIQUID, ANISOTROPY
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

Dielectric relaxation dynamics properties of 5CB (4-cyano-4-pentylbiphenyl) and BAC(4-[4-(S)-2-methylbutoxybenzoyloxy]benzoic acid) have been investigated. In this respect, dielectric properties of 5CB plus (1%)BAC have been compared with 5CB. The polarizing microscopy results show that BAC and 5CB exhibit enantiotropic N* mesophase and N mesophase, respectively. The real (epsilon ') and imaginary components (epsilon '') of dielectric constant have been calculated by capacitance method. The dielectric relaxation mechanisms of liquid crystals have been analyzed by Cole-Cole plots and the Debye distribution parameters (alpha) have been calculated. It has been also determined that adding BAC to 5CB increases the voltage dependent dielectric strength.