Reentrant Nematic Mixtures

Abstract
Binary mixtures of some terminal non-polar liquid crystals with the two terminal polar liquid crystals 4-cyano-4′-n-octyloxy-biphenyl (8 CBP) and 4-cyano-benzylidene-4′-n-octyloxyaniline (CBOOA) exhibit reentrant nematic phases. The phase diagram of the system 8 CBP/CBOOA indicates that the pure components show this effect too. X-ray data on layer thickness and transition enthalpies are presented.