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Phase Diagram of Mixed Mesomorphic Benzylideneanilines — MBBA/EBBA

  • George W. Smith
  • Zack G. Gardlund
  • Ralph J. Curtis

Abstract

The crystal-nematic transition of binary mixtures of MBBA and EBBA is strongly sensitive to thermal history. A metastable phase (β-phase) has a eutectic-like minimum melting point of about -14°. However, a sample maintained at -18°C for about one day -will convert to a stable phase (α-phase) with a minimum melting temperature of 13°C. The stable phase seems to be a solid solution. The crystal-nematic latent heat of transformation LKN for the α-phase is linearly dependent on concentration, but that for the β-phase has a minimum, The concentration-dependence of the nematic-isotropic transition temperature is similar to that reported elsewhere for other systems. The nematic-isotropic latent heat of transition is essentially linearly dependent on concentration.

Keywords

Differential Scanning Calorimetry Metastable Phase Melting Behavior Adiabatic Calorimetry Differential Scanning Calorimetry Peak 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  • George W. Smith
    • 1
  • Zack G. Gardlund
    • 1
  • Ralph J. Curtis
    • 1
  1. 1.General Motors Research LaboratoriesWarrenUSA

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