INFLUENCE OF CYCLOHEXANONE ADMIXTURE ON MOLECULAR ARRANGEMENT ORDER-S OF CHOLESTERYL NONANOATE

The influence of a cyclohexanone admixture on molecular arrangement order S of cholesteryl nonanoate has been investigated. The refractive indices of the four mixtures containing 1. 96%, 3. 82%, 5. 67% and 7. 50% cyclohexanone in nonanoate as a function of temperature were measured using an Abbe refractometer. A calculation of the order parameter S based on the following formula S equals alpha //z minus alpha //y / alpha //1 minus alpha //q was performed. Values of the principal polarizabilities in this expression were counted from the Lorentz-Lorenz equation and from Vuks' formula. From the data obtained, the results show that the order parameter of the mesophase of the nonanoate solutions in the given range of concentrations do not differ from the order parameter of the mesophase of pure nonanoate. The non-mesogenic substance affects only the temperature value, decreasing the mesophase transitions.