Liquid crystal polymer film for flexible copper-clad plate applied to 5G communication and preparation method of liquid crystal polymer film

The invention belongs to the technical field of high-molecular polymers, and particularly relates to a liquid crystal polymer film for a flexible copper-clad plate applied to 5G communication and a preparation method of the liquid crystal polymer film. The liquid crystal polymer film provided by the invention comprises a liquid crystal polymer, and the liquid crystal polymer is prepared from the following monomers: p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, biphenol, biphenyl dicarboxylic acid and octafluoro-4,4'-diphenol. The preparation method comprises the steps of prepolymerization, solid phase polycondensation, mixing, melt extrusion, lamination, stretching and winding. According to the invention, binding force between metal copper foil and the liquid crystal polymer film prepared by introducing the novel monomer octafluoro-4,4'-diphenol, the p-hydroxybenzoic acid, the 6-hydroxy-2-naphthoic acid, the biphenol and the biphenyl dicarboxylic acid through copolymerization is substantially improved, p