Resumen

GARCIA-SANCHEZ, Eduardo; MARTINEZ, Francisco J  y  MENDOZA-HUIZAR, Luís H. Analysis of Pressure-Temperature Behavior in the Isotropic-Nematic Transition of PAA to vary of SW Range. Inf. tecnol. [online]. 2009, vol.20, n.4, pp. 39-50. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642009000400006.

This work shows a study on the effect of the potential range in the Second Order Perturbation Theory developed by García-Sánchez et al. for potential range values of 3.5, 4, 10, 15, 17 and 20 with a/b=3.5, It was observed a better theoretical prediction for the potential range of 20, which is in agreement with the theoretical formulation of the perturbation theory that includes the long range approximation of Ponce and Renon. In this approximation the potential range is considered to have an infinite value. From the present study, it is possible to conclude that if during the theoretical prediction, higher values of the square well potential range are considered in the theoretical model, it is possible to get a better prediction of the experimental behavior pressure-temperature in the isotropic-nematic phase transition for liquid crystal P-azoxianisol.

Palabras llave : phase transition; liquid crystal; p-Azoxianisol; isotropic-nematic; perturbation theory.