| 摘要 |
The present invention relates to a polyamide-imide precursor having a molecular structure in which a first polymer and a second polymer are copolymerized, the first polymer being derived from a polymerization reaction between a dianhydride and a diamine and the second polymer being derived from a polymerization reaction between a diamine and an aromatic dicarbonyl compound, the diamine comprising 3-50 mol% of at least one component among 9,9-bis(4-aminophenyl)fluorene (FDA) and 9,9-bis(4-amino-3fluorophenyl)fluorene (F-FDA), based on the total moles of diamine. The present invention also relates to a copolymer polyamide-imide in which the polyamide-imide precursor has been imidized, and a copolymer polyamide-imide film formed by means of an imidization reaction of the polyamide-imide precursor. The present invention also relates to an image display device comprising the copolymer polyamide-imide film. |
