Phase diagram of binary mixture TM74A : E48 liquid crystals

In this study, mixtures of two different commercially available liquid crys tals (LC) were used to formulate a technologically viable LC operating at r oom temperature. Nematic E7 (BDH) and cholesteric TM74A were mixed at diffe rent weight ratios with 10 % increments. Transition temperatures were deter -mined via Differential Scanning Calorimetry and phase identification was d one using Optical Polarizing Microscopy. The phase diagram showed the exist ence of three different phases for the temperature range of IG-80 degreesC --cholesteric-nematic mesophase. smectic A phase and isotropic. For mixture s that are largely nematic (more than 50% E7), the smectic phase has vanish ed and the cholestric-nematic phase dominated from 30-60 degreesC.