Table of Contents
SRX Chemistry
Volume 2010, Article ID 534608, 14 pages
http://dx.doi.org/10.3814/2010/534608
Research Article

Effect of Molecular Structure on the Phase Behavior of Ternary Mixtures Made from Unsymmetrical 1,4-Phenylene bis 4-Substituted Benzoates

Department of Chemistry, Faculty of Science, University of Cairo, Giza, Egypt

Received 8 August 2009; Revised 25 September 2009; Accepted 8 October 2009

Copyright © 2010 Refaat I. Nessim. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Ternary mixtures formed from components of the five series of unsymmetrical 1,4-phenylene bis-4-substituted benzoates (Ina--e), in which the substituent (X) alternatively changed from CH3O,CH3, Cl, NO2, and CN, respectively, while, within each homologous series, the length of the terminal alkoxy group varies between n=6, 8, or 14 carbons, were prepared and characterized for their mesophase behaviour. Transition temperatures of the mixtures prepared were measured by differential scanning calorimetry and the phases identified by polarized-light microscopy.