Chain-Shuttling Polymerization at Two Different Scandium Sites: Regio- and Stereospecific 'One-Pot' Block Copolymerization of Styrene, Isoprene, and Butadiene

摘要

The development of new generations of polymerization catalysts and technology for efficient, selective synthesis of novel polymer materials having well-controlled microstruc-tures and desired properties has been a long-standing research subject of both academic and industrial scientists. in this endeavor, exploring the potential of untapped elements is an important strategy. Recently, the chain-shuttling copolymerization of two different monomers by two Group 4 metal catalysts that show different monomer selectivities has emerged as a powerful technology for the preparation of olefin block copolymers with different segments.