Tailorable polyimide prepolymer blends, crosslinked polyimides, and articles formed therefrom

A tailorable polyimide prepolymer blend comprising an end group component, a dianhydride component, and a diamine component. The dianhydride component includes at least 3,4,3′,4′-benzophenonetetracarboxylic dianhydride (BTDA), derivatives thereof, or combinations thereof, and 3,4,3′,4′-biphenyltetracarboxylic dianhydride (BPDA), derivatives thereof, or combinations thereof. The diamine component includes at least 1,3-phenylenediamine (mPDA), derivatives thereof, or combinations thereof; 1,4-phenylenediamine (pPDA), derivatives thereof, or combinations thereof; bis amino phenoxy benzene (APB), derivatives thereof, and combinations thereof; and optionally, 4,4′-(1,3-phenylene-bis(1-methylethylidene)bisaniline (Bis-M), derivatives thereof, and combinations thereof. A cured polyimide matrix has a glass transition temperature of at least about 450° F. (232° C.). An article formed from the tailorable polyimide prepolymer blend may be a powder, a neat resin, a coating material, a film, an adhesive, a fiber, a composite, a laminate, a prepreg, a part, and combinations thereof.