Polyamideimide film and flexible display panel including the same

A polyamideimide film comprising an amideimide structure derived from a dianhydride, a diamine, and an aromatic diacid dichloride,

• wherein the dianhydride comprises an aromatic dianhydride and a cycloaliphatic dianhydride, and 10 to 50 mol of the aromatic dianhydride and 10 to 60 mol of the cycloaliphatic dianhydride are included with respect to 100 mol of the diamine,
• wherein the diamine comprises a first fluorine-based aromatic diamine which forms an amine-terminated polyamide oligomer intermediate with the aromatic diacid dichloride in deriving the amideimide structure,
• wherein a chlorine content in the film is 5 to 33 ppm;
• an initial yellow index of the film is 2 or less;
• and a yellow index change amount ΔYI satisfies the following equation 1, the yellow index change amount being measured in accordance with UV weathering accelerated test ASTM E313 after repeating a process of irradiating 0.55 W/m2 of ultraviolet A rays having a wavelength of 340 nm at 40° C. for 20 hours and then blocking ultraviolet A rays having a wavelength of 340 nm for 4 hours three times:
• ΔYI≤4 [Equation 1]
• wherein ΔYI is the yellow index after a UV weathering accelerated test—the initial yellow index.