The invention relates to an alicyclic-containing
polyimide film. The molecular structure general formula of the film is the right formula, wherein, -CA- is a bivalence connection group of an alicyclic dibasic primary amine, -Ar- is a bivalence connection group of an aromatic dibasic primary amine, and -R- is a bivalence connection group of an aromatic dibasic estolide. The preparation thereof includes: the alicyclic dibasic primary amine and the aromatic dibasic primary amine are dissolved in non-
proton organic solvent with strong polarity, the aromatic dibasic estolide is added, the non-
proton organic solvent with strong polarity is used for regulating the
viscosity of the alicyclic-containing
polyamic acid resin solution after reaction for 1-3 hours, forming is carried out in a
curtain coating machine, and
dehydration fever imidization, cooling and demoulding are carried out so as to obtain the film. The preparation method has mild reaction condition and low cost and is
environmentally friendly; and meanwhile, the alicyclic-containing
polyimide film has excellent mechanic property and
heat resistant property and low water absorption, and the visible
light transmission thereof is as high as more than 97%. The film has good application prospect in the fields of optical
waveguide material, photorefractive material and photoelectric material in
optical communication field and direct action membrane material in the
liquid crystal display field and the like.