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|Title:||Pressure studies on 7S5, 8S5 and their mixtures|
Krishna Prasad, S.
|Publisher:||Gordon and Breach Science Publishers.|
|Citation:||Molecular Crystals and Liquid Crystals, 1983, Vol.99, p193-202|
|Abstract:||Pressure studies have been taken up on heptyloxy-p'-pentylphenylthiobenzoate , octyloxy-p'-pentylphenyl thiobenzoate and their mixtures. It is observed that the range of the smectic A phase increases with increasing pressure with an accompanying decrease in the smectic C range. Thus, although two kinds of triple points, viz., crystal-smectic C nematic and smectic (mosaic)-smectic C-smectic A have been observed in the P-T diagrams of and the NAC point observed in the temperature-concentration diagram of binary mixtures of and at the 42.5% concentration of could not be observed in the P-T diagram of either the pure compounds or the mixtures, whose concentrations were chosen on either side of the critical 42.5% concentration. These studies also show that pressure has the effect of increasing the stability of the monolayer smectic A in contrast to the case of the bilayer smectic A wherein pressure destabilizes the layer causing the nematic phase to reenter.|
|Description:||Restricted Access. Paper presented at the 9th international conference on liquid crystals held at Bangalore in 1982.|
|Copyright:||1983 OPA (Overseas Publishers Association) N.V.|
|Appears in Collections:||Research Papers (SCM)|
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|1983 MCLC V99 p193.pdf|
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