Ethylene Homo- and Copolymerization Catalyzed by Vanadium, Zirconium, and Titanium Complexes Having Potentially Tridentate Schiff Base Ligands | Sciact - CRIS-система Института катализа

Ethylene Homo- and Copolymerization Catalyzed by Vanadium, Zirconium, and Titanium Complexes Having Potentially Tridentate Schiff Base Ligands Научная публикация

Журнал

Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694

Вых. Данные

Год: 2021, Том: 400, Страницы: 184-194 Страниц : 11 DOI: 10.1016/j.jcat.2021.05.036

Ключевые слова

1-octene; Chemical composition distribution; Copolymerization; Ethylene; Shiff base ligand; Vanadium complex; Ziegler-Natta polymerization

Авторы

Białek Marzena ¹ , Fryga Julia ¹ , Spaleniak Grzegorz ¹ , Matsko Mikhail A. ² , Hajdasz Natalia ¹

Организации

1	University of Opole, Institute of Chemistry, Oleska 48, 45-052 Opole, Poland
2	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Prospect Akademika Lavrentieva, 5, 630090 Novosibirsk, Russia

Информация о финансировании (1)

Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)

0239-2021-0004

New potentially tridentate Schiff base ligands, 2-[({4-[(3-N,N-dimethylamino)propyl] phenyl}imino)methyl]-4,6-di-tert-butylphenol (L1H) and 2-[{2-(N-phenyl-N-methylaminomethyl)-phenylimino}-methyl]-4,6-di-tert-butylophenol (L2H) were prepared and after deprotonation they were reacted with VOCl3 or MCl4 (where M = Zr or Ti) to produce corresponding complexes (L1-V, L2-V, L1-Zr, L2-Ti) with good yields. All new compounds were characterized by the 1H and 13C NMR as well as FTIR spectroscopic methods. Upon activation with Et2AlCl or EtAlCl2, both the vanadium complexes exhibited exceptionally high catalytic activities in the ethylene polymerization (up to 69,000 kg/(molV⋅h) for L1-V and 101,500 kg/(molV⋅h) for L2-V) and remarkable thermal stability, and they produced UHMWPE. The complexes of group 4 metals were tested in the ethylene polymerization in conjunction with MMAO and Al(iBu)3/Ph3CB(C6F5)4, and L1-Zr was highly active (11,300 kg/(molZr⋅h)) and L2-Ti was moderately active (750 kg/(molTi⋅h)) when activated with MMAO. Furthermore, L1-2-V/EtAlCl2 systems were found to be very efficient in 1-octene incorporation and they produced copolymers with narrow chemical composition distributions and very narrow molecular weight distributions (Mw/Mn ≈ 2). In contrast to them, the catalysts based on titanium and zirconium complexes in conjunction with Al(iBu)3/Ph3CB(C6F5)4 gave copolymers with very broad comonomer and molecular weight distributions as well as with high molecular weights (Mw = 440,000–690,000 g/mol). It was also found that the chain transfer mechanism involved in the copolymerization process in the presence of vanadium and group 4 metal complexes was different. © 2021 The Author(s)

Białek M. , Fryga J. , Spaleniak G. , Matsko M.A. , Hajdasz N.
Ethylene Homo- and Copolymerization Catalyzed by Vanadium, Zirconium, and Titanium Complexes Having Potentially Tridentate Schiff Base Ligands

Journal of Catalysis. 2021. V.400. P.184-194. DOI: 10.1016/j.jcat.2021.05.036 WOS Scopus РИНЦ CAPlusCA OpenAlex

Полный текст от издателя

Поступила в редакцию:	31 мар. 2021 г.
Принята к публикации:	31 мая 2021 г.
Опубликована online:	9 июн. 2021 г.
Опубликована в печати:	1 авг. 2021 г.

Web of science:	WOS:000678546300005
Scopus:	2-s2.0-85109099192
РИНЦ:	46875550
Chemical Abstracts:	2021:1564055
Chemical Abstracts (print):	175:425032
OpenAlex:	W3171146579

БД	Цитирований
Scopus	14
Web of science	12
РИНЦ	11
OpenAlex	12