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Generation of Ultra‐High‐Molecular‐Weight Polyethylene from Metallocenes Immobilized onto N‐Doped Graphene Nanoplatelets
Author(s) -
Choi Baekhap,
Lee Juno,
Lee Seungjun,
Ko JaeHyeon,
Lee KyoungSeok,
Oh Junghoon,
Han Jongwoo,
Kim YongHyun,
Choi Insung S.,
Park Sungjin
Publication year - 2013
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201200768
Subject(s) - nanomaterials , materials science , catalysis , graphene , polyethylene , doping , nanotechnology , steric effects , hybrid material , carbon nanotube , ligand (biochemistry) , metal , polymer chemistry , chemical engineering , organic chemistry , chemistry , composite material , biochemistry , receptor , optoelectronics , engineering , metallurgy
Catalytic natures of organometallic catalysts are modulated by coordinating organic ligands with proper steric and electronic properties to metal centers. Carbon‐based nanomaterials such as graphene nanoplatelets are used with and without N‐doping and multiwalled carbon nanotube as a ligand for ethylene polymerizations. Zirconocenes or titanocenes are immobilized on such nanomaterials. Polyethylenes (PEs) produced by such hybrids show a great increase in molecular weight relative to those produced by free catalysts. Specially, ultra‐high‐molecular‐weight PEs are produced from the polymerizations at low temperature using the hybrid with N‐doped graphene nanoplatelets. This result shows that such nanomaterials act a crucial role to tune the catalytic natures of metallocenes.