INVESTIGATION OF LIQUID CRYSTAL POLYMER (LCP) STRUCTURES, THE BASIS OF ENGINEERING PLASTICS

Abstract

Anisotropic solids that incorporate the fluidity properties of liquids and have a crystalline structure are called liquid crystal substances. In liquid crystals (LC), we also see some properties that solids and liquids do not have. We also observe liquid crystals in nature and technological applications. Today, we also see liquid crystals in most modern electronic displays and LCD screens. liquid crystals (LC); It is divided into thermotropic, lyotropic, and metallotropic phases. Thermotropic and lyotropic phases are composed of organic molecules. While there is a phase change in the liquid crystal, thermotropic liquid crystals undergo a temperature change. The concentration and temperature of the LC molecules in the solvent are important when it is desired to create a phase change in lyotropic liquid crystals. Lyotropic liquid crystals are very common in living systems. The cell membrane and some proteins are liquid crystal. The mixture of both organic and inorganic substances is called Metallotropic liquid crystal. Temperature, inorganic-organic concentration are important in phase changes of all liquid crystals.

In this study; liquid crystals, general properties of liquid crystals and the reasons for the formation of liquid crystals and their application areas were examined. It is emphasized in which situations thermotropic and lyotropic phases have liquid crystal properties. The synthesis, chemical and physical structure of liquid crystals and LCD technology, where liquid crystals are frequently used in the display industry, are examined.