abstract |
The present invention provides a polyamide-imide copolymer, which is obtained by copolymerizing an aromatic diamine monomer, a dianhydride monomer and an aromatic dicarbonyl monomer, wherein the aromatic diamine monomer comprises a diamine containing an amide group (—CONH2) represented by formula (1), and Q1, X1, X2, R1, R2, Y1, Y2 and m are as defined herein: |