Microscopic and Thermal Phase Studies at High Pressures: Tbba and Some of Its Homologues

J. Herrmann Department of Chemistry, Physical Chemistry Laboratory, University of Bochum, FRG

A. Bartelt Department of Chemistry, Physical Chemistry Laboratory, University of Bochum, FRG

H. D. Kleinhans Department of Chemistry, Physical Chemistry Laboratory, University of Bochum, FRG

H. Reisig Department of Chemistry, Physical Chemistry Laboratory, University of Bochum, FRG

G. M. Schneider Department of Chemistry, Physical Chemistry Laboratory, University of Bochum, FRG

Abstract

The phase behaviour of some Terephthal-bis-(4-n-alkylanilines) (TBAAs) has been studied up to 5 kbar in the temperature range from 300 to 650 K using a differential thermal analysis equipment (DTA) and a diamond anvil cell (DAC) mounted on a polarizing microscope. All substances exhibit a complex T-p behaviour, which is discussed with respect to the stability of the different liquid crystalline phases.

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Microscopic and Thermal Phase Studies at High Pressures: Tbba and Some of Its Homologues

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