Modified Conjugated Diene-Based Polymer And Method Of Preparing The Same

A modifier represented by Formula 1:

• wherein, in Formula 1,
• R1 is a monovalent hydrocarbon group having 1 to 20 carbon atoms;
• or a monovalent hydrocarbon group having 1 to 20 carbon atoms which includes at least one heteroatom selected from the group consisting of nitrogen (N), sulfur (S), and oxygen (O),
• R2 is a divalent hydrocarbon group having 1 to 20 carbon atoms which is unsubstituted or substituted with at least one substituent selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, and an aryl group having 6 to 30 carbon atoms;
• or a divalent hydrocarbon group having 1 to 20 carbon atoms which includes at least one heteroatom selected from the group consisting of N, S, and O, and
• R3 and R4 are each independently a monovalent hydrocarbon group having 1 to 20 carbon atoms which is unsubstituted or substituted with at least one substituent selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, and an aryl group having 6 to 30 carbon atoms, or R3 and R4 are connected to each other to form an aliphatic or aromatic ring having 5 to 20 carbon atoms.