Ionic homometallic and heterometallic Titanium/Transition and Non-Transition metals complexes stabilized with crown ether in the polymerization of ethylene

New ionic complexes with various metals (Mg2+, titanium in various oxidation states, and iron triad metals) in the 15-crown-5 cavity as a cation and a titanium-containing anion have been synthesized. The structure of some synthesized complexes was determined by X-ray diffraction analysis. These compounds, in the presence of the Al/Mg activator {Et2AlCl + Bu2Mg}, catalyze the polymerization of ethylene with the formation of ultrahigh molecular weight polyethylene (UHMWPE) with molecular weights up to 2.56·106 Da. Only complexes with a titanium-containing anion showed catalytic activity; its maximum value −4651 kg of PE/mol·h·atm was exhibited by the complex [15C5 ⊃ FeIIICl·2CH3CN]2+[Ti2Cl10]2-. The resulting ultra-high molecular weight polyethylene (Mv to 2.56•106 Da) can be processed by a solventless method into high-strength (up to 2.45 GPa) and high-modulus (up to 144 GPa) oriented tapes. Most polyethylene samples have a linear structure, with the exception of polymers obtained on Ni/Ti complexes, which have 2–3 branches per 1000 carbon atoms.

Авторы
Ch. Gagieva Svetlana1, 2 , Tuskaev Vladislav A.1, 2 , Magomedov Kasim F.1 , Khrustalev Viktor N. 3, 4 , Evseeva Maria D.1 , Ezernitskaya Marina G.2 , Aksenova Svetlana A.2, 3 , Buzin Mikhail I.2 , Antoshkina Evgenia P.2, 5 , Saracheno Daniele2 , Golubev Evgenii K.2, 6 , Bulychev Boris M.1
Издательство
Elsevier Ltd
Язык
Английский
Страницы
112720
Статус
Опубликовано
Том
205
Год
2024
Организации
  • 1 Department of Chemistry, M. V. Lomonosov Moscow State University, 1 Leninskie Gory, 119992 Moscow, Russian Federation
  • 2 A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova St. 28, 119991 Moscow, Russian Federation
  • 3 Российский университет дружбы народов
  • 4 Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, Moscow 119991, Russian Federation
  • 5 The Moscow Institute of Physics and Technology, Institutskiy per. 9, Dolgoprudny, Moscow Region, 141701, Russian Federation
  • 6 Enikolopov Institute of Synthetic Polymer Materials, Russian Academy of Sciences, Profsoyuznaya Str., 70, 117393 Moscow, Russian Federation
Дата создания
17.06.2024
Дата изменения
17.06.2024
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/107042/
Поделиться

Другие записи

Zubkevich Sergey V., Tuskaev Vladislav A., Gagieva Svetlana Ch., Pavlov Alexander A., Khrustalev Victor N., Wang Fei, Pan Li, Li Yuesheng, Saracheno Daniele, Vikhrov Anton A., Zarubin Dmitry N., Bulychev Boris M.
Chinese Journal of Chemistry. Shanghai Institute of Organic Chemistry. Том 41. 2023. С. 2855-2865