| 摘要 |
PROBLEM TO BE SOLVED: To provide a melt-processable random copolyimide having semicrystallinity, and exhibiting the (semi)crystallinity recoverable from its melt, and further to provide a method for producing the copolyimide. SOLUTION: This copolyimide is produced from a reaction product of (I) an aromatic dianhydride component comprising 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA) and/or 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA), and an aromatic carboxylic dianhydride (ODPA) including 4,4'- oxydiphthalic dianhydride, (II) an aromatic diamine component selected from the group consisting of 1,3-bis(4-aminophenoxy)benzene (APB-134), 3,4'- oxydianiline (3,4'-ODA), 4,4'-oxydianiline (4,4'-ODA) and 1,4-diaminobenzene (PPD), and (III) an end-capping component. |
