Photo alignment material and method of manufacturing display substrate using the same
A photo alignment material includes a photo alignment polymer and an organic solvent. The photo alignment polymer is prepared by polymerizing a diamine monomer including at least two photo reactive parts represented by the following Chemical Formula 1. In Chemical Formula 1, R 1 represents —(CH 2 ) n —, —O(CH 2 ) n — or R 2 , R 3 and R 4 each independently represent —H, —O(CH 2 ) m—1 —CH 3 or and n and m independently represent an integer of from 1 to 8. Thus, change of the orientation of the alignment layer due to the action of an electric stress may be prevented and/or reduced. Therefore, an after—image may be reduced, and display quality is improved.
1. A photo alignment material comprising:
a photo alignment polymer prepared by polymerizing a diamine monomer including at least two photo reactive parts, wherein the at least two photo reactive parts comprises a chemical compound represented by the following Chemical Formula 1, wherein
R 1 represents —(CH 2 ) n —or —O(CH 2 ) n —, and R 2 , R 3 and R 4 each independently represent —H, —O(CH 2 ) m-1 —CH 3 or
and n and m each independently represent an integer of from 1 to 8; and
an organic solvent
2. The photo alignment material of claim 1 , wherein the photo reactive part is represented by the following Chemical Formula 2, wherein R 1 represents —(CH 2 ) n —or —O(CH 2 ) n —,
R 2 , R 3 and R 4 each independently represent —H, —O(CH 2 ) m-1 —CH 3 or
n and m each independently represent an integer of from 1 to 8, R 5 represents
R 7 represents —H, —O(CH 2 ) a-1 —CH 3 or
a and b each independently represent an integer of from 1 to 8, R 6 represents —O(CH 2 ) e —CX 2 —CY 3 , X and Y each independently represent a hydrogen atom or a fluorine atom, and e represents an integer of from 1 to 18
3. The photo alignment material of claim 1 , wherein the diamine monomer comprises at least one selected from the group consisting of chemical compounds represented by the following Chemical Formulas 3 and 4 , wherein R 1 represents —(CH 2 ) n—or —O(CH 2 ) n —, R 2 , R 3 and R 4 each independently represent —H, —O(CH 2 ) m-1 —CH 3 or
n and m each independently represent an integer of from 1to 8, R 5 represents
R 7 represents —H, —O(CH 2 ) a-1 CH 3 or
a and b each independently represent an integer of from 1 to 8, R 6 represents —O(CH 2 ) e —CX 2 —CY 3 , X and Y each independently represent a hydrogen atom or a fluorine atom, and e represents an integer of from 1 to 18
4. The photo alignment material of claim 1 , wherein the photo reactive part is represented by the following Chemical Formula 7, wherein R 1 represents —(CH 2 ) n—or —O(CH 2 ) n —, R 2 , R 3 and R 4 each independently represent —H, —O(CH 2 ) m-1 —CH 3 or
n and m each independently represent an integer of from 1 to 8, R 5 represents
R 7 represents —H, —O(CH 2 ) a-1 —CH 3 or
a and b independently represent an integer of from 1 to 8, R 6 represents —O(CH 2 ) e —CX 2 —CY 3 , X and Y each independently represent a hydrogen atom or a fluorine atom, and e represents an integer of from 1 to 18
5. A photo alignment material comprising:
a photo alignment polymer prepared by polymerizing a diamine monomer including at least two photo reactive parts, the diamine monomer comprising at least one selected from the group consisting of chemical compounds represented by the following Chemical Formulas 8, 9 and 10, wherein R 1 represents —(CH 2 ) n —, —O(CH 2 ) n—or
R 2 , R 3 and R 4 each independently represent —H, —O(CH 2 ) m-1 —CH 3 or
n and m each independently represent an integer of from 1 to 8, R 5 represents
R 7 represents —H, —O(CH 2 ) a-1 —CH 3 or
a and b each independently represent an integer of from 1 to 8, R 6 represents —O(CH 2 ) e —CX 2 —CY 3 , X and Y each independently represent a hydrogen atom or a fluorine atom, and e represents an integer of from 1 to 18
6. The photo alignment material of claim 1 , wherein the organic solvent comprises at least one selected from the group consisting of chlorobenzene, N -methylpyrrolidone, dimethylsulfoxide, toluene, chloroform, gamma-butyrolactone, methylcellosolve, butylcellosolve, butylcarbitol and tetrahydrofuran.
7. A photo alignment material comprising:
a photo alignment polymer prepared by polymerizing a diamine monomer including at least two photo reactive parts, the diamine monomer comprising at least one selected from the group consisting of chemical compounds represented by the following Chemical Formulas 5 and 6, wherein R 1 represents —(CH 2 ) n,
or O(CH 2 ) n—, R 2 , R 3 and R 4 each independently represent —H, —O(CH 2 ) m-1 —CH 3 or
n and m each independently represent an integer of from 1 to 8, R 5 represents
R 7 represents —H, —O(CH 2 ) a-1 —CH 3 or
a and b each independently represent an integer of from 1 to 8, R 6 represents —O(CH 2 ) e —CX 2 —CY 3 , X and Y each independently represent a hydrogen atom or a fluorine atom, and e represents an integer of from 1 to 18