Olefin polymer and preparation method thereof

A preparation method of an olefin polymer, the preparation method comprising the step of polymerizing olefinic monomers in the presence of a supported catalyst,

• wherein the supported catalyst comprises a support, and a first transition metal compound represented by Chemical Formula 1 and a second transition metal compound represented by Chemical Formula 2 which are supported on the support:
• in Chemical Formula 1,
• M is Ti, Zr or Hf,
• X1 and X2 are each independently selected from the group consisting of halogen, a nitro group, an amido group, a phosphine group, a phosphide group, a C1 to C20 alkyl group, a C1 to C20 alkoxy group, a C2 to C20 alkoxyalkyl group, a silyl group, a C1 to C20 alkylsilyl group, a C2 to C20 alkenyl group, a C6 to C20 aryl group, a C1 to C20 sulfonate group, and a C1 to C20 sulfone group,
• T is C, Si, Ge, Sn or Pb,
• Q1 and Q2 are each independently selected from the group consisting of hydrogen, halogen, a C1 to C20 alkyl group, a C2 to C20 heterocycloalkyl group, a C1 to C20 alkoxy group, a C2 to C20 alkoxyalkyl group, a C1 to C20 carboxylate, and a C2 to C20 alkenyl group,
• R is selected from the group consisting of a C1 to C20 alkyl group, a C1 to C20 alkoxy group, a C2 to C20 alkoxyalkyl group, a silyl group, a C1 to C20 alkylsilyl group, a C1 to C20 silylalkyl group, a C1 to C20 silyloxyalkyl group, a C2 to C20 alkenyl group, and a C6 to C20 aryl group, and
• R1 to R9 are each independently selected from the group consisting of hydrogen, a C1 to C20 alkyl group, a C1 to C20 alkoxy group, a C2 to C20 alkoxyalkyl group, a silyl group, a C1 to C20 alkylsilyl group, a C1 to C20 silylalkyl group, a C1 to C20 silyloxyalkyl group, a C2 to C20 alkenyl group, and a C6 to C20 aryl group,
• in Chemical Formula 2,
• M′ is Ti, Zr or Hf,
• X3 and X4 are each independently selected from the group consisting of halogen, a nitro group, an amido group, a phosphine group, a phosphide group, a C1 to C20 alkyl group, a C1 to C20 alkoxy group, a C2 to C20 alkoxyalkyl group, a silyl group, a C1 to C20 alkylsilyl group, a C2 to C20 alkenyl group, a C6 to C20 aryl group, a C1 to C20 sulfonate group, and a C1 to C20 sulfone group, and
• R11 to R20 are each independently selected from the group consisting of hydrogen, a C1 to C20 alkyl group, a C1 to C20 alkoxy group, a C2 to C20 alkoxyalkyl group, a silyl group, a C1 to C20 alkylsilyl group, a C1 to C20 silylalkyl group, a C1 to C20 silyloxyalkyl group, a C2 to C20 alkenyl group, and a C6 to C20 aryl group, or one or more pairs of neighboring substituents of R11 to R20 are optionally connected with each other to form a substituted or unsubstituted aliphatic or aromatic ring.