Polyimide film prepared through carbonyl dianhydride and diamine

The invention discloses a polyimide film prepared through carbonyl dianhydride and diamine and belongs to the technical field of high molecular material preparation. The polyimide film prepared through carbonyl dianhydride and diamine comprises, by weight, 20-2000 parts of polyimide, 2-8 parts of coupling agents, 2-3 parts of zirconium oxide and 1-2 parts of carbon nano tubes. The formed film has a more reasonable state of aggregation, molecular weights are distributed more evenly, arrangement between macromolecule chains is more compact, tidier and more uniform, and the phenomenon that the longitudinal performance and the transverse performance are different is avoided. The shrinking percentage of the formed film keeps unchanged, and the packaging requirement of a flexible circuit board is met.