Composition of preparing poly(imide-benzoxazole) copolymer, poly(imide-benzoxazole) copolymer, article containing poly(imide-benzoxazole) copolymer, and display device including same

1. A composition for preparing a poly(imide-benzoxazole) copolymer, comprising:

a tetracarboxylic acid dianhydride comprising a combination of 3,3′4,4′-biphenyl tetracarboxylic dianhydride and 4,4′-(hexafluoroisopropylidene)diphthalic anhydride,

a diamine comprising 2,2′-bis(fluoromethyl)benzidine, and

a diamine represented by Chemical Formula 3:

wherein in Chemical Formula 3,

L 1 is a phenylene group, and L 2 is a single bond,

wherein the mole ratio of the tetracarboxylic acid dianhydride to the total moles of the diamine comprising 2,2′-bis(fluoromethyl)benzidine and the diamine represented by Chemical Formula 3 is about 1:1, and wherein an amount of the diamine represented by Chemical Formula 3 is 1 mole percent to 5 mole percent based on the total mole number of the diamine comprising 2,2′-bis(fluoromethyl)benzidine and the diamine represented by Chemical Formula 3.

2. The composition for preparing the poly(imide-benzoxazole) copolymer according to claim 1 , wherein the tetracarboxylic acid dianhydride further comprises one or more selected from bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic dianhydride, 3,3′,4,4′-diphenylsulfone tetracarboxylic dianhydride, 4,4′-oxydiphthalic anhydride, pyromellitic dianhydride, 4-(2,5-dioxotetrahydrofuran-3-yl)-1,2,3,4-tetrahydronaphthalene-1,2-dicarboxylic anhydride, and bis(3,4-dicarboxyphenyl)sulfone dianhydride.

3. The composition for preparing the poly(imide-benzoxazole) copolymer according to claim 1 ,

wherein in the tetracarboxylic acid dianhydride 3,3′,4,4′-biphenyl tetracarboxylic dianhydride is present in an amount of about 10 mole percent to about 55 mole percent and 4,4′-(hexafluoroisopropylidene)diphthalic anhydride is present in an amount of about 90 mole percent to about 45 mole percent.

4. A poly(imide-benzoxazole) copolymer prepared from the composition according to claim 1 .

5. A poly(imide-benzoxazole) copolymer comprising:

(i) a structural unit represented by Chemical Formula 4, Chemical Formula 5, or a combination thereof; and

(ii) a structural unit represented by Chemical Formula 6, Chemical Formula 7, or a combination thereof:

wherein in Chemical Formulae 4 to 7,

R 1 is represented by Chemical Formula 8 and Chemical Formula 9:

wherein in Chemical Formula 8,

R 10 is C(CF 3 ) 2 ,

wherein in Chemical Formulae 4 and 5, R 2 is represented by Chemical Formula 13,

wherein in Chemical Formulae 6 and 7,

L 1 is a phenylene group, and L 2 is a single bond,

wherein an amount of the structural unit represented by Chemical Formula 6, Chemical Formula 7, or a combination thereof is 1 mole percent to 5 mole percent based on the mole number of the total structural units in the poly(imide-benzoxazole) copolymer.

6. The poly(imide-benzoxazole) copolymer according to claim 5 ,

wherein R 1 in Chemical Formulae 4 to 7 comprises the structural unit represented by Chemical Formula 8 in an amount of about 90 mole percent to about 45 mole percent, and the structural unit represented by Chemical Formula 9 in an amount of about 10 mole percent to about 55 mole percent.

7. The poly(imide-benzoxazole) copolymer according to claim 5 , further comprising one or more structural units selected from the structural units represented by Chemical Formulae 14 to 17:

wherein in Chemical Formula 14,

R a is a substituted or unsubstituted C3 to C30 alicyclic organic group, a substituted or unsubstituted C6 to C30 aromatic organic group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a substituted or unsubstituted C13 to C20 fluorenylene group,

R 11 is a substituted or unsubstituted C6 to C30 aromatic organic group,

R 3 and R 4 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 —OR 200 , wherein R 200 is a C1 to C10 aliphatic organic group, a silyl group of formula —SiR 201 R 202 R 203 , wherein R 201 , R 202 , and R 203 are the same or different and each are independently a hydrogen, or a C1 to C10 aliphatic organic group, and

n1 and n2 are the same or different and each are independently an integer ranging from 0 to 4;

wherein in Chemical Formula 15,

R 5 is a substituted or unsubstituted C6 to C30 aromatic organic group,

R 6 and R 7 are the same or different and each are independently an electron withdrawing group selected from —CF 3 , —CCl 3 , —CBr 3 , —Cl 3 , —F, —Cl, —Br, —I, —NO 2 , —CN, —COCH 3 , and —CO 2 C 2 H 5 ,

R 8 and R 9 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 —OR 204 , wherein R 204 is a C1 to C10 aliphatic organic group, or a silyl group of formula —SiR 205 R 206 R 207 , wherein R 205 , R 206 , and R 207 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,

provided that n4+n6 is an integer ranging from 1 to 4;

wherein in Chemical Formula 16,

R 14 is O, S, C(═O), CH(OH), S(═O) 2 , Si(CH 3 ) 2 , (CH 2 ) p wherein 1≤p≤10, (CF 2 ) q , wherein 1≤q≤10, C(CH 3 ) 2 , C(CF 3 ) 2 , C(═O)NH, or a substituted or unsubstituted C6 to C30 aromatic organic group, wherein the aromatic organic group includes one aromatic ring, two or more aromatic rings fused together to provide a condensed ring system, or two or more aromatic rings linked through a single bond or through a functional group selected from a fluorenylene group, O, S, C(═O), CH(OH), S(═O) 2 , Si(CH 3 ) 2 , (CH 2 ) p wherein 1≤p≤10, (CF 2 ) q wherein 1≤q≤10, C(CH 3 ) 2 , C(CF 3 ) 2 , and C(═O)NH,

R 15 is a substituted or unsubstituted C6 to C30 aromatic organic group,

R 16 and R 17 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 —OR 212 , wherein R 212 is a C1 to C10 aliphatic organic group, or a silyl group of formula —SiR 213 R 214 R 215 , wherein R 213 , R 214 , and R 215 are the same or different, and each are independently a hydrogen or a C1 to C10 aliphatic organic group, and

n9 and n10 are each independently an integer ranging from 0 to 4;

wherein in Chemical Formula 17,

R 18 is O, S, C(═O), CH(OH), S(═O) 2 , Si(CH 3 ) 2 , (CH 2 ) p wherein 1≤p≤10, (CF 2 ) q , wherein 1≤q≤10, C(CH 3 ) 2 , C(CF 3 ) 2 , C(═O)NH, or a substituted or unsubstituted C6 to C30 aromatic organic group, wherein the aromatic organic group includes one aromatic ring, two or more aromatic rings fused together to provide a condensed ring system, or two or more aromatic rings linked through a single bond or through a functional group selected from a fluorenylene group, O, S, C(═O), CH(OH), S(═O) 2 , Si(CH 3 ) 2 , (CH 2 ) p wherein 1≤p≤10, (CF 2 ) q wherein 1≤q≤10, C(CH 3 ) 2 , C(CF 3 ) 2 , and C(═O)NH,

L 1 is a phenylene group, and

L 2 is a single bond.

8. An article comprising the poly(imide-benzoxazole) copolymer according to claim 5 .

9. The article according to claim 8 , wherein the article is a film having a thickness of about 50 micrometers, and the film has yellowness index of less than about 5.5, measured by using ASTM D1926, and tension modulus of about 4.0 giga Pascals or higher, measured by ASTM D882.

10. A display device comprising the article according to claim 8 .