Cyclic olefin compound, photoreactive polymer, and alignment layer comprising the same

A photoreactive polymer comprising a repeating unit of the following formula 3a or 3b:

• wherein independently, m is 50 to 5,000;
• q is an integer from 0 to 4;
• at least one of R1, R2, R3 and R4 is any one selected from the group consisting of radicals represented by the following formula 1a and 1b,
• among the R1 to R4, the remainders other than the radical of the formula 1a or 1b are the same as or different from one another and independently selected from the group consisting of hydrogen;
• halogen;
• substituted or unsubstituted linear or branched alkyl having 1 to 20 carbon atoms;
• substituted or unsubstituted linear or branched alkenyl having 2 to 20 carbon atoms;
• substituted or unsubstituted linear or branched alkynyl having 2 to 20 carbon atoms;
• substituted or unsubstituted cycloalkyl having 3 to 12 carbon atoms;
• substituted or unsubstituted aryl having 6 to 40 carbon atoms;
• and a polar functional group comprising at least one of oxygen, nitrogen, phosphor, sulfur, silicon, and boron,
• when the R1 to R4 are not hydrogen, halogen, or a polar functional group, at least one of a R1 and R2 coordination and a R3 and R4 coordination is bonded to each other to form an alkylidene group having 1 to 10 carbon atoms;
• or R1 or R2 is bonded to either R3 or R4 to form a saturated or unsaturated aliphatic ring having 4 to 12 carbon atoms or an aromatic ring having 6 to 24 carbon atoms,
• wherein A is chemical bond, oxygen, sulfur, or —NH—;
• B is selected from the group consisting of chemical bond, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, carbonyl, carboxy, ester, substituted or unsubstituted arylene having 6 to 40 carbon atoms, and substituted or unsubstituted heteroarylene having 6 to 40 carbon atoms;
• X is oxygen or sulfur;
• R9 is selected from the group consisting of chemical bond, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, substituted or unsubstituted alkenylene having 2 to 20 carbon atoms, substituted or unsubstituted cycloalkylene having 3 to 12 carbon atoms, substituted or unsubstituted arylene having 6 to 40 carbon atoms, substituted or unsubstituted aralkylene having 7 to 15 carbon atoms, and substituted or unsubstituted alkynylene having 2 to 20 carbon atoms;
• at least one of R10 to R14 is a radical represented by -L-R15-R16- (substituted or unsubstituted C6-C40 aryl),
• among the R10 to R14, the remainders other than the radical of -L-R15-R16- (substituted or unsubstituted C6-C40 aryl) are the same as or different from one another and independently selected from the group consisting of hydrogen;
• halogen;
• substituted or unsubstituted alkyl having 1 to 20 carbon atoms;
• substituted or unsubstituted alkoxy having 1 to 20 carbon atoms;
• substituted or unsubstituted aryloxy having 6 to 30 carbon atoms;
• substituted or unsubstituted aryl having 6 to 40 carbon atoms;
• and heteroaryl having 6 to 40 carbon atoms with a hetero element in Group 14, 15 or 16;
• L is selected from the group consisting of oxygen, sulfur, —NH—, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, carbonyl, carboxy, —CONH—, and substituted or unsubstituted arylene having 6 to 40 carbon atoms;
• R15 is substituted or unsubstituted alkyl having 1 to 10 carbon atoms;
• and
• R16 is selected from the group consisting of chemical bond, —O—, —C(═O)O—, —OC(═O)—, —NH—, —S—, and —C(═O)—.