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Title: Scaled particle theory of a system of hard right circular cylinders
Authors: Savithramma, K.L.
Madhusudana, N.V.
Issue Date: Sep-1981
Publisher: Gordon and Breach Science Publishers.
Citation: Molecular Crystals and Liquid Crystals, 1981, Vol.74, p243-259
Abstract: We have applied the scaled particle theory to a system of hard right circular cylinders. By varying the radius to height ratio R, we can study either rod-like molecules (R < 0.5) or disc-like molecules (R < 0.5). We have calculated the packing fraction dnem, the density jump (b.deltab.rho/b.rho), the order parameters >P2n<, the entropy change b.deltaS/NK, Pvo/KT and the isothermal compressibility b.beta of the isotropic phase at the nematic-isotropic transition point for a range of values of R. By expanding the angle dependent terms occuring in the theory in a series of even Legendre polynomials, it is found that terms at least up to P4(cosb.thetas) have to be retained to get qualitatively correct results. The thermodynamic properties at the nematic-isotropic transition point appear somewhat symmetrical for the rod-like and disc-like regions if they are plotted as functions of the ratio (largest dimension/shortest dimension) of the cylinders.
Description: Restricted Access. Proceedings of the 8th international liquid crystal conference held in 1980 at Kyoto.
ISSN: 1058-725X
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Copyright: 1981 OPA (Overseas Publishers Association) N.V.
Appears in Collections:Research Papers (SCM)

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