PHASE STUDIES OF A MIXED TRIMETHYLTETRADECYLAMMONIUM BROMIDE HEXADECYLTRIMETHYLAMMONIUM BROMIDE SYSTEM

A phase studies was carried out on the phase equilibria in the three c omponent systems of single and binary mixture (1:1) of trimethyltetrad ecylammonium bromide (TTAB) and hexadecyltrimethylammonium bromide (HT AB) with water and 1-hexanol at 30-degrees-C. The phases were separate d by repeated centrifugation. The birefringence was observed under cro ss polarizers and their consistency, texture and optical pattern were examined under the polarizing microscope. On the basis of the results obtained, a phase diagram was drawn that consists of two phases of iso tropic solution and two mesophases. Results also showed a larger regio n for the lamellar liquid crystalline in the mixed system. The critica l micelle concentration for the micellar region of the mixture was fou nd at 0.0014 mol dm-3.