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http://hdl.handle.net/2289/2598| Title: | Effect of molecular ordering on the nematic-isotropic transition in reentrant nematic mixtures: A high pressure DTA and optical study |
| Authors: | Shashidhar, R. Kleinhans, H.D. Schneider, G.M. |
| Issue Date: | 1981 |
| Publisher: | Gordon and Breach Science Publishers. |
| Citation: | Molecular Crystals and Liquid Crystals Letters, 1981, Vol.72, p119-126 |
| Abstract: | The effect of pressure on the smectic A-nematic (A-N) and the nematicisotropic (N-I) phase boundaries has been studied as a function of mole fraction in mixtures of 4'-n-hexyloxy-4-cyanobiphenyl (60CB) and 4'-n-octyloxy-4-cyanobiphenyl (80CB) by DTA and optical microscopy. The maximum pressure of occurrence of the smectic A phase decreases with increasing 60CB mole fraction (x) until at xap0.30, there is no smectic A phase at all. The plot of dT/dp at 1 bar for the N-I transition versus mole fraction exhibits an anomalous decrease in the mole fraction range of 0.10 < × < 0.28 implying that the changes in molecular ordering which accompany the formation of the re-entrant nematic phase could manifest at much higher temperatures and affect thereby the pressure behaviour of even the N-I transition. |
| Description: | Restricted Access. |
| URI: | http://hdl.handle.net/2289/2598 |
| ISSN: | 1058-725X |
| Alternative Location: | http://dx.doi.org/10.1080/01406568108084047 |
| Copyright: | 1981 OPA (Overseas Publishers Association) N.V. |
| Appears in Collections: | Research Papers (SCM) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 1981 MCLC (Letters) V72 p119.pdf Restricted Access | Restricted Access | 228.93 kB | Adobe PDF | View/Open Request a copy |
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