Liquid crystalline polymers are a special type of thermoplastics that exhibit properties between highly ordered solid crystalline materials and amorphous disordered liquids over a well defined temperature range. The most common LCPs are liquid crystalline polyesters which can be produced by polycondensation of an aromatic hydroxycarboxylic acid and an aromatic dicarboxylic acid with an alipahtic diol as a coreactant. LC polymers are also widely used as functional materials in all kinds of optic and optoelectronic devices because their anisotropic material properties such as refractive index, birefringence, selective light reflection and transmitance, color characteristics are tunable by temperature, mechanical stress, and electromagnetic radiation and fields.
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