High-impact-strength liquid crystal polyarylester as well as preparation method and application thereof

The invention belongs to the technical field of high-molecular polymers, and particularly relates to high-impact-strength liquid crystal polyarylester as well as a preparation method and application thereof. The liquid crystal polyarylester disclosed by the invention is prepared from p-hydroxybenzoic acid, hydroquinone, diphenyldicarboxylic acid and 4-(4-carboxyl-3-fluorophenyl)-2-fluorobenzoic acid through the steps of prepolymerization and solid phase polycondensation. According to the invention, the novel monomer 4-(4-carboxyl-3-fluorophenyl)-2-fluorobenzoic acid is introduced for copolymerization with p-hydroxybenzoic acid, hydroquinone and diphenyldicarboxylic acid, so the impact strength of the liquid crystal polyarylester can be remarkably improved and can reach 170 J/m or above, better melt tension can be obtained and can reach 6 mN or above, the requirements of electronic thin-wall workpieces on impact resistance can be met, and stable film preparation can be realized. 本发明属于高分子聚合物技术领域，具体涉及一种高冲击强度液晶聚芳