LINEAR POLYIMIDE PRECURSOR, LINEAR POLYIMIDE, THERMALLY CURED PRODUCT OF THE LINEAR POLYIMIDE, AND METHOD FOR PRODUCING THE LINEAR POLYIMIDE

摘要

A linear polyimide is produced from mellophanic dianhydride, diamine (NH₂-A-NH₂), and a monofunctional acid anhydride and contains a repeating unit represented by the following general formula (3);(wherein A represents a divalent aromatic diamine residue or aliphatic diamine residue, B represents a monofunctional acid anhydride residue, and n represents a degree of polymerization).;The polyimide has good solubility in organic solvents and thermoplasticity and also has high adhesive force to a copper foil and a non-thermoplastic polyimide film, a high glass transition temperature, and high toughness.