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Variation of Ultrasonc and Thermo Acoustic Parameters of CYNO Byphenyl Liquid Crystal(8OCB) With Temperature

Author

Listed:
  • Dr. M. Baba Fakruddin

    (Sri Sai Baba National Degree College (Autonomous), Anantapuramu-515001, A. P)

  • Dr. K. P. Venkateswara Rao

    (Sri Sai Baba National Degree College (Autonomous), Anantapuramu-515001, A. P)

Abstract

This research paper communicates the investigations of variation of Ultrasonic and thermoacoustic parameters with temperature of a technically important Liquid crystal 8OCB (4′-octyloxy-4-cyanobiphenyl). Parameters like adiabatic compressibility, Molar sound velocity, Molar compressibility and intermolecular free length and also certain thermoacoustic parameters like., isochoric temperature coefficient of internal pressure (χ), isochoric temperature coefficient of volume expansivity (χ′), pressure co-efficient of bulk modulus (c₠), reduced compressibility (β̄), reduced volume (v̄) and Sharma constant (S₀) are also evaluated. The anomalous behaviour observed in ultrasonic and thermoacoustic parameters provide supporting evidence to the smectic A- nematic transitions at 66°C and nematic- isotropic transition at 78°C of the liquid crystal under study.

Suggested Citation

  • Dr. M. Baba Fakruddin & Dr. K. P. Venkateswara Rao, 2026. "Variation of Ultrasonc and Thermo Acoustic Parameters of CYNO Byphenyl Liquid Crystal(8OCB) With Temperature," International Journal of Latest Technology in Engineering, Management & Applied Science, RSIS International, vol. 15(4), pages 742-745, April.
    • Handle: RePEc:bjf:ijltem:v:15:y:2026:i:4:a:2368
    DOI: 10.51583/IJLTEMAS.2026.150400067
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