Phase Diagrams of Binary Nematic Mesophase Systems

Temperatures and heats of transition are presented for four binary nematic mesophases; p-azoxyanisole plus p-azoxyphenetole, p, p' -n-dipro-poxyazoxybenzene, p, p'-n-dibutoxyazoxybenzene and p, p'-n-dihexyloxy-azoxybenzene. The phase diagrams were shown to be of the simple eutectic type with the formation of ideal comesophase solutions permitting prediction of the eutectic composition and temperature. The heats of transitions can be estimated with reasonable accuracy.