Titanium(+4) and vanadium(+5) 8-oxyquinolinates as catalysts for the synthesis of high-molecular-weight polyethylene and ethylene-octene copolymers

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发表日期：

2024年4月1日

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V. A. Tuskaev,
S. Ch. Gagieva,
K. F. Magomedov,
S. A. Aksenova,
M. D. Evseeva,
A. O. Vikhrov,
D. Saracheno,
M. I. Buzin,
D. A. Davydov,
D. A. Khanin,
B. M. Bulychev

摘要

New titanium(+4) and vanadium(+5) 8-oxyquinolinate complexes were synthesized. Their structures were determined by X-ray diffraction. The synthesized compounds catalyze the polymerization of ethylene in the presence of Al/Mg activators, {Et₂AlCl/Bu₂Mg} and {Et₃Al₂Cl₃/Bu₂Mg} (up to 3400 kg of PE (mol of [M] h atm)⁻¹), to form ultrahigh-molecular-weight polyethylene with a molecular weight up to 5.3•10⁶ Da. The synthesized compounds are shown to be efficient precatalysts for the synthesis of ethylene-octene copolymers. A high insertion of 1-octene into the copolymer composition, up to 9.5%, was observed for vanadium [bis(7-tert-butyl-2,5-dimethyl-8-oxyquinolinato)]dipropoxide.