Poly(imide-amide) copolymer, article including poly(imide-amide) copolymer, and display device including the article

A method of preparing an article comprising:

• preparing a poly(imide-amide) copolymer comprising a structural unit represented by Chemical Formula 1 and a structural unit represented by Chemical Formula 3,
• adding a silane compound represented by Chemical Formula 15 to the poly(imide-amide) copolymer, thereby introducing the silane compound to a side chain of a structural unit represented by the Chemical Formula 1 to form a structural unit represented by Chemical Formula 2, and thereby obtaining a poly(imide-amide) copolymer comprising a structural unit represented by Chemical Formula 1, a structural unit represented by Chemical Formula 2, and a structural unit represented by Chemical Formula 3,
• introducing inorganic particles or a precursor thereof to the poly(imide-amide) copolymer comprising a structural unit represented by Chemical Formula 1, a structural unit represented by Chemical Formula 2, and a structural unit represented by Chemical Formula 3 to produce a poly(imide-amide) nano composite composition, and
• curing the poly(imide-amide) nano composite composition to provide the article:
• wherein in Chemical Formulae 1 to 3,
• comprises a structural unit represented by at least one of Chemical Formula 8 and Chemical Formula 9:
• wherein in Chemical Formulae 8 and 9,
• R12 and R13 are the same or different and each are independently a halogen, a hydroxyl group, a substituted or unsubstituted C1 to C10 aliphatic organic group, a substituted or unsubstituted C6 to C20 aromatic organic group, an alkoxy group of formula —OR205, wherein R205 is a C1 to C10 aliphatic organic group, a silyl group of formula —SiR 209, R210, R211, wherein R209 , R210, and R211 are the same or different and each are independently a hydrogen, or a C1 to C10 aliphatic organic group, and
• n7 and n8 are the same or different and each are independently an integer ranging from 0 to 3;
• comprises a structural unit represented by Chemical Formula 6:
• wherein in Chemical Formula 6,
• R6 and R7 are the same or different and each are independently an electron withdrawing group,
• R8 and R9 are the same or different, and each are independently a halogen, a hydroxy group, a substituted or unsubstituted C1 to C10 aliphatic organic group, a substituted or unsubstituted C6 to C20 aromatic organic group, an alkoxy group of formula —OR204, wherein R204 is a C1 to C10 aliphatic organic group, or a silyl group of formula —SiR205R206R207, wherein R205, R206, and R207 are the same or different, and each are independently a hydrogen, a C1 to C10 aliphatic organic group,
• n3 is an integer ranging from 1 to 4,
• n5 is an integer ranging from 0 to 3,
• provided that n3+n5 is an integer ranging from 1 to 4,
• n4 is an integer ranging from 1 to 4, and
• n6 is an integer ranging from 0 to 3,
• wherein in Chemical Formula 2,
• Rb and Rc are the same or different and each are independently a hydrogen, a C1 to C20 alkyl, a C2 to C20 alkenyl, a C2 to C20 alkynyl, a C3 to C20 cycloalkyl, or a C6 to C18 aryl,
• Rd is a substituted or unsubstituted alkylene, a substituted or unsubstituted alkenylene, a substituted or unsubstituted alkynylene, a substituted or unsubstituted cycloalkylene, a substituted or unsubstituted cycloalkenylene, a substituted or unsubstituted cycloalkynylene, a substituted or unsubstituted arylene, or a substituted or unsubstituted aralkylene, and
• n is an integer of 1 to 3;
• and
• wherein in Chemical Formula 3,
• R1 is a combination of the following chemical formulae:
• and
• wherein in Chemical Formula 15,
• Rb, Rc, and Rd are as defined in Chemical Formula 2, and
• n is an integer of 1 to 3.