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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2011, 2, 7—17.
Phase Equilibria in Nematic Mixtures of Hard Uniaxial and Biaxial Particles
E. P. Sokolova
Author affiliations Department of Chemistry, St. Petersburg State University,
Universitetsky Pr., 26. 198504. St. Petersburg, Russia
Abstract Nematic and demixing behaviour of binary and ternary mixtures of rod- and platelike hard particles is studied using the off-lattice restricted-orientation model of rectangular parallelepipeds with the D2h symmetry. It is shown that the region of a miscible nematic phase formed in rod/plate mixtures can be considerably broadened due to adding a cosolvent with particles of the appropriate shape and size. The results are compared with those of other molecular-statistical models. The phase equilibria of an experimental system are also reported which exhibits a behaviour close to the systems studied by model calculations.
Keywords: the Zwanzig model, rod-plate mixtures, demixing, biaxial nematic phase