Katalysatoren für die lebende Insertionspolymerisation von Alkenen: mit Ziegler-Natta-Chemie zu neuartigen Polyolefin-Architekturen

Discrete Metal‐Based Catalysts for the Copolymerization of CO2 and Epoxides: Discovery, Reactivity, Optimization, and Mechanism

“…Most of the major advances in metal-catalyzed polymerization, including stereoselective [39] and living [40] alkene polymerization, lactide and lactone polymerization, [41] olefin metathesis, [42] and alkene/CO copolymerization, [43] are the result of progress in homogeneous catalyst design. They have many processing advantages over their soluble counterparts, but often contain multiple active sites that result in polymers with broad polydispersity indices (PDIs) and composition distributions.…”

The synthesis and X-ray structure of a phenoxyimine catalyst tailored for living olefin polymerisation and the synthesis of ultra-high molecular weight polyethylene and atactic polypropylene

“…Non-metallocene group IV metal complexes as catalysts for living olefin polymerisation have been of great research interest in recent years [2,3]. Living polymerisation enables the access to very high molecular weight polymers of low molecular mass distribution, controlled reaction conditions and the sequential synthesis of block copolymers [4,5].…”

“…Doi et al obtained syndiotactic poly(propylene) using [V(acac) 3 ] as catalyst activated by diethyl aluminiumchloride at temperatures below À65°C [6,7]. This became known as the first reaction fulfilling all criteria for a living olefin polymerisation [5]. This technique was used later to synthesise terminally functionalised poly(propylene)s [8][9][10][11] which were also used as macromonomers [12].…”

“…Recently, Fujita et al at Mitsui Chemicals Inc. found a new class of catalysts for living olefin polymerisation, the so-called FI catalysts [5,[27][28][29]. They described the synthesis of phenoxyimine titanium(IV) dichloride complexes bearing two 3 0 -substituted salicylidene anilinato ligands which when activated by methylaluminoxane show extremely high activity in living ethylene polymerisation and enable the synthesis of block copolymers when the anilinato ring is substituted by fluorine atoms in both orthopositions [30][31][32].…”

Living random and block copolymerization of ethene and propene on a tailor-made phenoxyimine catalyst and characterization of the resulting high molecular weight PE-block-P(E-co-P) block copolymers

“…Post-metallocene group IV metal complexes as catalysts for living olefin polymerisation have been of great research interest in recent years [2,3]. Living polymerisation enables the access to very high molecular weight polymers with low molecular weight distributions, controlled reaction conditions and the sequential synthesis of block copolymers [4,5]. Recently Fujita et al at Mitsui Chemicals, Inc. w found a new class of catalysts for living olefin polymerisation, the so-called FI catalysts [3,6,7].…”