Binuclear and hexanuclearTi(IV) complexes supported by [OOOO]4--type ligand for preparing disentangled UHMWPEстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 8 декабря 2019 г.
Аннотация:Binuclear and hexanuclear titanium complexes stabilized by tetradentate [OOOO]4- type ligand are active in ethylene polymerization in the presence of Et2AlCl/Bu2Mg binary cocatalyst,
giving high molecular weight polyethylene. The binuclear complex showed
significantly higher catalytic activity and thermal stability in comparison to mononuclear
analogue. UHMWPE samples were processed by a solid-state uniaxial deformation into highstrength
(up to 2.5 GPa) and high-modulus (over 100 GPa) oriented film tapes, which indirectly
indicates a low degree of entanglements between the macromolecular chains.