A simple molecular theory of a nematic-nematic phase transition in highly polar compounds

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2994

Title:	A simple molecular theory of a nematic-nematic phase transition in highly polar compounds
Authors:	Govind, A.S. Madhusudana, N.V.
Issue Date:	May-1993
Publisher:	Taylor & Francis
Citation:	Liquid Crystals, 1993, Vol.14, p1539 - 1551
Abstract:	We have extended an earlier molecular model which was developed to explain the double reentrant sequence in highly polar compounds to predict the possibility of a nematic (N1)-nematic (N2) phase transition in such compounds. At moderate densities the dipolar interactions would give rise to an antiparallel near neighbour arrangement of the polar molecules while at higher densities, the dipole-induced dipole and chain-chain dispersion interactions give rise to a parallel configuration. The N1-N2 transition corresponds to a jump in the relative concentration of the two species. Using the mean field approximation we have calculated the phase diagram. The weak first order transition disappears above a critical point as a function of an appropriate parameter. We have also calculated the specific heat anomaly around the transition region.
Description:	Restricted Access. Proceedings of the 14th international liquid crystals conference, Pisa, Eds. G W Gray et al., 1993
URI:	http://hdl.handle.net/2289/2994
ISSN:	0267-8292 1366-5855 (Online)
Alternative Location:	http://dx.doi.org/10.1080/02678299308026466
Copyright:	1993 Taylor & Francis
Appears in Collections:	Research Papers (SCM)

Files in This Item:

File	Description	Size	Format
1993 LC V14 p1539.pdf Restricted Access	Restricted Access.	417.03 kB	Adobe PDF	View/Open Request a copy