Polyolefin-polystyrene-based multiblock copolymer and method for preparing the same

A method for preparing a polyolefin-polystyrene-based multiblock copolymer, the method comprising:

• polymerizing an olefin-based monomer using an organozinc compound as a chain transfer agent in the presence of a catalyst composition to form a polyolefin block, wherein the catalyst composition comprises a transition metal compound represented by the following Formula 1 and a compound represented by Formula 5;
• and
• anionic polymerizing the polyolefin block and a styrene-based monomer in the presence of an alkyllithium compound containing a silicon atom and a triamine compound to form a polystyrene block:
• wherein, in Formula 1,
• M is Ti, Zr or Hf,
• R1 to R4 are each independently hydrogen, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group of 3 to 20 carbon atoms, or a substituted or unsubstituted aryl group of 6 to 20 carbon atoms, where adjacent two or more among them may be connected to form a ring,
• R5 and R6 are each independently hydrogen, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group of 3 to 20 carbon atoms, or a substituted or unsubstituted aryl group of 6 to 20 carbon atoms, where the substituent is an alkyl group of 1 to 12 carbon atoms,
• each R7 is independently a substituted or unsubstituted alkyl group of 4 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group of 4 to 20 carbon atoms, or a substituted or unsubstituted aryl group of 6 to 20 carbon atoms,
• n is 1 to 5, and
• Y1 and Y2 are each independently a halogen group, a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, an alkenyl group of 2 to 20 carbon atoms, an alkynyl group of 2 to 20 carbon atoms, a cycloalkyl group of 3 to 20 carbon atoms, an aryl group of 6 to 20 carbon atoms, an alkylaryl group of 7 to 20 carbon atoms, an arylalkyl group of 7 to 20 carbon atoms, a heteroaryl group of 5 to 20 carbon atoms, an alkoxy group of 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group of 5 to 20 carbon atoms, an alkylamino group of 1 to 20 carbon atoms, an arylamino group of 5 to 20 carbon atoms, an alkylthio group of 1 to 20 carbon atoms, an arylthio group of 5 to 20 carbon atoms, an alkylsilyl group of 1 to 20 carbon atoms, an arylsilyl group of 5 to 20 carbon atoms, a hydroxyl group, an amino group, a thio group, a silyl group, a cyano group, or a nitro group,
• —[Al(Ra)—O]m— [Formula 5]
• in Formula 5,
• each Ra is independently a halogen radical, a hydrocarbyl radical of 1 to 20 carbon atoms, or a halogen-substituted hydrocarbyl radical of 1 to 20 carbon atoms, and
• m is an integer of 2 or more.