Propylene−Styrene Multiblock Copolymers: Evidence for Monomer Enchainment via Opposite Insertion Regiochemistry by a Single-Site Catalyst

摘要: Polymerization of propylene promoted by the post-metallocene catalyst 1 and methylaluminoxane (MAO) produces oligomers containing prevailingly unsaturated chain ends which are diagnostic a primary (1,2) regiochemistry insertion. The styrene polymerization in presence multiblock copolymers long isotactic sequences interrupted short strings. microstructure these elucidated 13C NMR analysis shows that opposite insertion two monomers is retained copolymerization, producing tail-to-tail head-to-head linkages between homopolymer blocks.