Method for preparing olefin-polar monomer copolymer

A method for preparing an olefin-polar monomer copolymer, comprising copolymerizing an olefin and a polar monomer in the presence of a catalyst and optionally a chain transfer agent to produce the olefin-polar monomer copolymer,

• wherein, the catalyst comprises a main catalyst and optionally a cocatalyst, the main catalyst comprises a diimine-metal complex represented by Formula I:
• wherein, R1 and R2 are each independently a C1-C30 hydrocarbyl with or without a substituent Q;
• R3 and R4 are each independently selected from the group consisting of hydrogen, halogen, hydroxy, C1-C20 hydrocarbyl with or without a substituent Q, and adjacent R3 and R4 groups are optionally joined to form a ring or ring system;
• each R11 is independently a C1-C20 hydrocarbyl with or without a substituent Q;
• each Y is independently a Group VIA non-metal atom;
• each M is independently a Group VIII metal;
• each X is independently selected from the group consisting of halogen, C1-C10 hydrocarbyl with or without a substituent Q and C1-C10 hydrocarbyloxy with or without a substituent Q, or
• the main catalyst comprises an amino-imine metal complex represented by Formula I′:
• wherein, R1 and R2 are each independently a C1-C30 hydrocarbyl with or without a substituent Q;
• each R3 is independently selected from the group consisting of hydrogen and C1-C20 hydrocarbyl with or without a substituent Q;
• R5 to R8 are each independently selected from the group consisting of hydrogen, halogen, hydroxy, and C1-C20 hydrocarbyl with or without a substituent Q, and R5 to R8 groups are optionally joined to form a ring or ring system;
• each R12 is independently a C1-C20 hydrocarbyl with or without a substituent Q;
• each Y is independently a Group VIA non-metal atom;
• each M is independently a Group VIII metal;
• each X is independently selected from the group consisting of halogen, C1-C10 hydrocarbyl with or without a substituent Q and C1-C10 hydrocarbyloxy with or without a substituent Q,
• wherein each substituent Q in the diimine-metal complex or in the amino-imine metal complex is independently selected from the group consisting of halogen, hydroxy, C1-C10 alkyl, halogenated C1-C10 alkyl, C1-C10 alkoxy and halogenated C1-C10 alkoxy,
• wherein the olefin is an olefin having 2 to 16 carbon atoms, and
• wherein the polar monomer is one or more of olefinic alcohols represented by Formula G:
• wherein, L1-L3 are each independently selected from the group consisting of H and C1-C30 alkyl with or without a substituent, L4 is a C1-C30 alkylene optionally having a pendant group, or
• alternatively, the polar monomer is an unsaturated carboxylic acid represented by Formula G′:
• wherein, L1-L3 are each independently selected from the group consisting of H and C1-C30 alkyl with or without a substituent, L4 is a C1-C30 alkylene having a pendant group.