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http://hdl.handle.net/2289/3048| Title: | The re-entrant nematic phase in some pure compounds and their mixtures at atmospheric pressure |
| Authors: | Moodithaya, K.P.L. Madhusudana, N.V. |
| Issue Date: | 1980 |
| Publisher: | Heyden |
| Citation: | Proceedings of the international liquid crystals conference, Bangalore, 1979. Ed. S Chandrasekhar. Heyden, 1980, p121-129 |
| Abstract: | Recently we reported the occurrence of the re-entrant nematic phase in three pure compounds at atmospheric pressure: (i) trans-p-n-decyloxy-a-methyl-p'- cyanophenyl cinnamate (10 OMCPC), (ii) 4-cyanophenyl-3-methyl-4(4-n-undecyl- benzoyloxy) benzoate (11CPMBB) and (iii) 4-cyanophenyi-3-methyl-4 (4-n-dodecyl- benzoy loxy) benzoate (12CPMBB) . We have now studied the light scattering arising from twist fluctuations as a function of temperature in these compounds which again confirms the formation of the re-entrant nematic phase. We also present in this paper, phase diagrams of binary mixtures involving these compounds. In addition, we have determined the orientational order parameter in the nematic, smectic A and re-entrant nematic phases using (a) infrared dichroic studies on homeotropically aligned samples, and (b) optical birefringence studies again on homeotropically aligned samples employing a new technique. |
| Description: | Restricted Access. |
| URI: | http://hdl.handle.net/2289/3048 |
| ISBN: | 0-85501-163-7 |
| Copyright: | 1980 Heyden |
| Appears in Collections: | Research Papers (SCM) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 1980 Proc Int Liquid Crystals Conf p121.pdf Restricted Access | Restricted Access. | 396.29 kB | Adobe PDF | View/Open Request a copy |
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