Definitions

para-graphed

Para-azoxyanisole

para-Azoxyanisole (PAA) is a zwitterionic liquid crystal. In a solid state, it appears as a white powder, but when heated it forms a liquid crystal. As one of the first known and most readily prepared liquid crystals, p-azoxyanisole has been played an important role in the development of liquid crystal displays.

Its liquid crystal range is from 118 °C to 136 °C. The solid to nematic transition is at 118 °C and the nematic to isotropic liquid transition at 136 °C.

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