| abstract |
A polyimide mixture comprising polyimide and silica particles containing amino groups. Polyimide includes repeating units represented by Formula 1: Formula 1, where Ar includes or , A includes , , , Or versus . The silicon dioxide particles containing amino groups are blended in the polyimide, and are obtained from the alkoxysilane represented by Formula 2 and the alkoxysilane represented by Formula 3 in the presence of a catalyst through hydrolysis and condensation reaction: Si ( OR 1 ) 4 formula 2, (NH 2 -Y) m -Si (OR 2 ) 4-m formula 3, wherein in formula 2, R 1 is an alkyl group having 1 to 10 carbon atoms; and in formula 3 , Y is an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, R 2 is an alkyl group having 1 to 10 carbon atoms, and m is an integer of 1 to 3. |