Journal of Thermal Analysis and Calorimetry

, Volume 92, Issue 1, pp 233–238 | Cite as

Thermal decomposition kinetics of some aromatic azomonoethers

Part II. Non-isothermal study of three liquid crystals in dynamic air atmosphere
  • A. RotaruEmail author
  • Anna Kropidłowska
  • Anca Moanţă
  • P. Rotaru
  • E. Segal


Thermal analysis of three azomonoether dyes, exhibiting liquid-crystalline properties, was performed in dynamic air atmosphere. Thermal stability studies and the evaluation of the kinetic parameters of each physical or chemical transformations are essential for a full characterization, before attempting accurate thin films’ depositions of such materials used in non-linear optical applications. New synthesized dyes with general formula:
where R is a nematogenic group: CN, CF3 or a highly polarizable group: NO2 were investigated using TG, DTG, DTA and DSC techniques, under non-isothermal regime. The evolved gases were analyzed by FTIR spectroscopy. The activation energies of the first decomposition step were evaluated for each compound, the obtained results revealing complex mechanisms.


dyes isoconversional methods liquid crystals non-isothermal kinetics thermal analysis 


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Copyright information

© Springer Science+Business Media, LLC. 2008

Authors and Affiliations

  • A. Rotaru
    • 1
    Email author
  • Anna Kropidłowska
    • 2
  • Anca Moanţă
    • 3
  • P. Rotaru
    • 4
  • E. Segal
    • 5
  1. 1.Laser Department, PPAMINFLPR, National Institute for Laser, Plasma and Radiation PhysicsMagureleRomania
  2. 2.Department of Inorganic Chemistry, Chemical FacultyGdańsk University of TechnologyGdańskPoland
  3. 3.Faculty of ChemistryUniversity of CraiovaCraiovaRomania
  4. 4.Faculty of PhysicsUniversity of CraiovaCraiovaRomania
  5. 5.Department of Physical Chemistry, Faculty of ChemistryUniversity of BucharestBucharestRomania

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