▎ 摘　　要

NOVELTY - Polyimide film is obtained by an imidization reaction of a polyamic acid containing quinoline and β -picoline as an imidation catalyst and acetic anhydride as a dehydrating agent. USE - The polyimide film is used for manufacturing a graphite sheet (claimed). ADVANTAGE - The polyimide film has excellent tensile strain characteristics in which uniformity of surface and internal properties is secured by using two types of imidation catalysts together, and breakage does not occur during film production, and provides graphene sheet with excellent quality. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for producing a graphite sheet involving carbonizing, graphitizing, or carbonizing and graphitizing the polyimide film.