Catalyst system for multi-block copolymer formation

An olefin polymerization catalyst system comprising:

• (A) a first olefin polymerization procatalyst,
• (B) a second olefin polymerization procatalyst, and
• (C) a chain shuttling agent,
• wherein the second olefin polymerization procatalyst comprises a metal-ligand complex of Formula (I):
• wherein M is titanium, zirconium, or hafnium;
• wherein each Z1 is independently a monodentate or polydentate ligand that is neutral, monoanionic, or dianionic, wherein nn is an integer, and wherein Z1 and nn are chosen in such a way that the metal-ligand complex of Formula (I) is overall neutral;
• wherein each Q1 and Q10 independently is selected from the group consisting of (C6-C40)aryl, substituted (C6-C40)aryl, (C3-C40)heteroaryl, and substituted (C3-C40)heteroaryl;
• wherein each Q2, Q3, Q4, Q7, Q8, and Q9 independently is selected from a group consisting of hydrogen, (C1-C40)hydrocarbyl, substituted (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl, substituted (C1-C40)heterohydrocarbyl, halogen, and nitro (NO2);
• wherein each Q5 and Q6 independently is selected from the group consisting of a (C1-C40)alkyl, substituted (C1-C40)alkyl, and [(Si)1—(C+Si)40] substituted organosilyl;
• wherein each N independently is nitrogen;
• optionally, two or more of the Q1-5 groups can combine together to form a ring structure, with such ring structure having from 5 to 16 atoms in the ring excluding any hydrogen atoms;
• and
• optionally, two or more of the Q6-10 groups can combine together to form a ring structure, with such ring structure having from 5 to 16 atoms in the ring excluding any hydrogen atoms.