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http://hdl.handle.net/2289/2919| Title: | A simple molecular theory of double reentrance exhibited by highly polar compounds |
| Authors: | Madhusudana, N.V. Rajan, Jyotsna |
| Issue Date: | Jan-1990 |
| Publisher: | Taylor & Francis |
| Citation: | Liquid Crystals, 1990, Vol.7, p31 - 40 |
| Abstract: | We show by simple model calculations that dipole-induced dipole and interchain interactions lead to a parallel alignment of molecules with strong longitudinal dipoles for intermolecular separations below a certain value. On the other hand an antiparallel alignment is favoured for larger separations because of dipole-dipole interactions. We incorporate this change in the intermolecular configuration, which naturally leads to two 'lengths' in the problem, in developing a simple McMillan type molecular theory of the double reentrance phenomenon in which the following phase sequence is observed on cooling the sample: isotropic-nematic-smectic Ad-reentrant nematic-smectic A1. The calculated properties including the phase diagram are in broad agreement with experimental trends. |
| Description: | Restricted Access. |
| URI: | http://hdl.handle.net/2289/2919 |
| ISSN: | 0267-8292 1366-5855 (online) |
| Alternative Location: | http://dx.doi.org/10.1080/02678299008029191 |
| Copyright: | 1990 Taylor & Francis |
| Appears in Collections: | Research Papers (SCM) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 1990 LC V7 p31.pdf Restricted Access | Restricted Access | 526.05 kB | Adobe PDF | View/Open Request a copy |
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