Polymer for optical film, method of preparing same, and optical film including same

A method of preparing a polymer for an optical film, the method comprising:

• contacting a monomer represented by the following Chemical Formula 1-1, a monomer represented by the following Chemical Formula 2-1, and a free radical initiator;
• and
• polymerizing the monomers to provide the polymer for the optical film:
• wherein, in Chemical Formula 1-1,
• R1 and R2 are the same or different in each monomer and are each independently hydrogen, a substituted or unsubstituted C1 to C10 aliphatic group, —CN, or —C(═O)OR200, wherein R200 is a substituted or unsubstituted C1 to C30 aliphatic group, a substituted or unsubstituted C3 to C30 alicyclic group, a substituted or unsubstituted C6 to C30 aromatic group, or a substituted or unsubstituted C2 to C30 heterocyclic group, wherein at least one of R1 and R2 is —CN or —C(═O)OR200,
• R3 is the same or different in each monomer and each is independently hydrogen, a substituted or unsubstituted C1 to C10 aliphatic group, —CN or —C(═O)OR201, wherein R201 is a substituted or unsubstituted C1 to C30 aliphatic group, a substituted or unsubstituted C3 to C30 alicyclic group, a substituted or unsubstituted C6 to C30 aromatic group, or a substituted or unsubstituted C2 to C30 heterocyclic group,
• R4 in Chemical Formula 1-1 is the same or different in each monomer and each is independently a halogen, a substituted or unsubstituted C1 to C30 aliphatic group, a substituted or unsubstituted C3 to C30 alicyclic group, a substituted or unsubstituted C6 to C30 aromatic group, a substituted or unsubstituted C2 to C30 heterocyclic group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryloxy group, a substituted or unsubstituted C2 to C30 ester group (—OC(═O)R202 or —C(═O)OR203, wherein R202 and R203 are the same or different and are each independently a C1 to C10 alkyl group), a substituted or unsubstituted C2 to C30 ketone group, a carboxyl group, a cyano group, or —N(R204)(R205) (wherein R204 and R205 are the same or different and are each independently hydrogen, or a substituted or unsubstituted C1 to C10 aliphatic group), wherein the alicyclic group, aromatic group, and heterocyclic group are present singularly;
• at least two of the alicyclic group, aromatic group, and heterocyclic group are linked to provide a condensed cyclic group;
• or at least two of the alicyclic group, aromatic group, and heterocyclic group are linked via a single bond, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O)2—, —Si(CH3)2—, —(CH2)p— (wherein 1≦p≦10), —(CF2)q— (wherein 1≦q≦10), —C(CH3)2—, —C(CF3)2—, or —C(═O)NH—, and
• n1 in Chemical Formula 1-1 is the same or different in each monomer and each is independently an integer ranging from 0 to 5,
• wherein, in Chemical Formula 2-1,
• R5 to R7 are the same or different in each monomer and are each independently hydrogen, or a substituted or unsubstituted C1 to C10 aliphatic group,
• R8 is the same or different in each monomer and each is independently a halogen, a substituted or unsubstituted C1 to C30 aliphatic group, a substituted or unsubstituted C3 to C30 alicyclic group, a substituted or unsubstituted C6 to C30 aromatic group, a substituted or unsubstituted C2 to C30 heterocyclic group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C6 to C30 aryloxy group, a substituted or unsubstituted C2 to C30 ester group (—OC(═O)R206 or —C(═O)OR207, wherein R206 and R207 are the same or different and are each independently a C1 to C10 alkyl group), a substituted or unsubstituted C2 to C30 ketone group, a carboxyl group, a cyano group, or —N(R208)(R209) (wherein R208 and R209 are the same or different and are each independently hydrogen, or a substituted or unsubstituted C1 to C10 aliphatic group), wherein the alicyclic group, aromatic group, and heterocyclic group are present singularly;
• at least two of the alicyclic group, aromatic group, and heterocyclic group are linked to provide a condensed cyclic group;
• or at least two of the alicyclic group, aromatic group, and heterocyclic group are linked via a single bond, —O—, —S—, —C(═O)—, —CH(OH)—, —S(═O)2—, —Si(CH3)2—, —(CH2)p— (wherein 1≦p≦10), —(CF2)q— (wherein 1≦q≦10), —C(CH3)2—, —C(CF3)2—, or —C(═O)NH—, and
• n2 in Chemical Formula 2-1 is the same or different in each monomer and each is independently an integer ranging from 0 to 5.