Liquid crystal molecules, also known as liquid crystal polymers, are abbreviated as LCP. Liquid crystal molecules will transform into liquid crystals when heated. Today, the editor will share with you the chemical structure and requirement analysis of liquid crystal molecules in high brightness LCD screens.
The molecular requirements for LCD screens are as follows:
1. The geometric shape of liquid crystal molecules should be anisotropic, and the aspect ratio (L/D) of the molecules must be greater than 4
2. The long axis of LCD screen molecules should not be easily bent and should have a certain degree of rigidity. Therefore, double or triple bonds are often introduced in the central part of the molecule to form a conjugated system, obtaining a rigid linear structure or keeping the molecule in a trans configuration to obtain a linear structure.
3. The molecular end contains polar or accessible groups. By the action of intermolecular electrical forces and dispersion forces, molecules maintain orientation and order.
The relationship between the chemical structure and properties of liquid crystal molecules
The properties of liquid crystals, including stability and phase transition regularity, depend on the molecular structure of the liquid crystal. Studying the relationship between the two is meaningful for the synthesis and application of new liquid crystal materials. The chemical structure of liquid crystal molecules has a significant impact on the stability of liquid crystals, including chemical stability, electrochemical stability, photochemical stability, and thermal stability. The characteristics of the liquid crystal phase show whether it is a near crystalline phase or a nematic phase, whether it is a univariant or a tautomeric phase, as well as the size of the temperature range of the mesocrystalline phase, which also has a regular relationship with certain structural factors.
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