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Dielectric and thermald relaxations in low molecular mass liquid crystals

  • C. Schick
  • B. Stoll
  • J. Schawe
  • A. Roger
  • M. Gnoth
Conference paper
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 85)

Abstract

The investigation of amorphous layers between crystalline lamellae allows the estimation of glass trasition length scales. Low molecular mass liquid crystals can form semicrystalline structures without extensive interfacial layers between crystalline and liquid regions like in polymers. First results from dielectric spectroscopy and calorimetry are presented. The semicrystalline sample shows a, complicated relaxation behavior without a typical glass transition. A thermally activated local process is observed (f 0=1020 Hz; E A=118 kJ/mol). It may be a residuum of the glass transition. Further investigations are necessary to get detailed information about structure d and relaxation behavior of these interesting materials.

Key Words

Liquid crystal thermal behavior dielectric relaxation activation parameters glass transition spatial limitations 

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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1991

Authors and Affiliations

  • C. Schick
    • 2
  • B. Stoll
    • 1
  • J. Schawe
    • 2
  • A. Roger
    • 2
  • M. Gnoth
    • 1
  1. 1.Abteilung Angewandte PhysikUniversität UlmFRG
  2. 2.Hochschule GüstrowInstitut f└ PhysikGüstrowFRG

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