In:
Applied Organometallic Chemistry, Wiley, Vol. 34, No. 11 ( 2020-11)
Abstract:
Titanium(IV) coordination compounds are effectively used as precatalysts for ethylene polymerization and copolymerization with other olefins. New titanium(IV) complexes 3b – d with ligands containing two diphenylcarbinol fragments linked by the perfluorinated hydrocarbon units –CF 2 – or –C 2 F 4 – were synthesized. The structures of complexes 3b and 3d were determined by X‐ray diffraction. Titanium atoms in 3b have a distorted trigonal‐bipyramidal coordination environment while spiro‐complex 3d is characterized by tetrahedral molecular geometry. The catalytic behavior of complexes activated by mixtures of Bu 2 Mg and alkylaluminium chlorides from among Me 2 AlCl, Et 2 AlCl, EtAlCl 2 , and Et 3 Al 2 Cl 3 were studied. The resulting catalytic systems catalyze ethylene polymerization to afford ultra‐high molecular weight polyethylene, suitable for modern processing methods, and the solvent‐free solid state formation of super high‐strength (1.37–2.75 GPa) and high‐modulus (up to 138 GPa) oriented film tapes. The same catalytic systems catalyze ethylene copolymerization with 1‐hexene to afford high molecular weight semicrystalline elastomeric polymers containing up to 20% of comonomer units.
Type of Medium:
Online Resource
ISSN:
0268-2605
,
1099-0739
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
1480791-9
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