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, vol.623, no.1, pp.17-30, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 623 Issue: 1
  • Publication Date: 2015
  • Doi Number: 10.1080/15421406.2014.990753
  • Title of Journal : MOLECULAR CRYSTALS AND LIQUID CRYSTALS
  • Page Numbers: pp.17-30
  • Keywords: 4-[4-(S)-2-Methylbutoxybenzoyloxy]benzoic acid, 4-cyano-4 '-pentylbiphenyl, absorption coefficient, dielectric strength, liquid crystal, relaxation mechanism, LIQUID, ANISOTROPY

Abstract

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.