New ferroelectric mixtures of liquid crystalline alpha-halogen carboxylates

Novel binary, ternary and four component mixtures of (S)-4-(2-chloro-3-meth ylbutanoyloxy)phenyl-4-[(n-alkoxy)benzoates] and 4-n-alkoxyphenyl 4-n-alkox ybenzoates were prepared exhibiting SmC* phase in a wide range near to room temperature. Phase diagrams and physical properties e.g. electro-optical r esponse, spontaneous polarization and switching time have been determined. The appearance and disappearance of different mesophases has been studied.