Sciact
  • EN
  • RU

Formation of Isolated Titanium(III) Ions as Active Sites of Supported Titanium-Magnesium Catalysts for Polymerization of Olefins Научная публикация

Журнал Macromolecular Chemistry and Physics
ISSN: 1022-1352 , E-ISSN: 1521-3935
Вых. Данные Год: 2014, Том: 215, Номер: 18, Страницы: 1707-1720 Страниц : 14 DOI: 10.1002/macp.201400142
Ключевые слова catalysts, polyethylene, polypropylene, Ziegler-Natta polymerization
Авторы Mikenas Tatiana B. 1 , Koshevoy Evgeny I. 1 , Zakharov Vladimir A. 1,2 , Nikolaeva Marina I. 1
Организации
1 The Laboratory of Catalytic Polymerization, Boreskov Institute of Catalysis Siberian Branch of the Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk 630090, Russia
2 Chemistry Department, Novosibirsk State University, St. Pirogova 2, Novosibirsk 630090, Russia

Информация о финансировании (1)

1 Министерство образования и науки Российской Федерации

Реферат: Electron spin resonance (ESR) studies reveal a high yield of isolated Ti3+ compounds (30-70% of the total titanium content) that form in superactive supported titanium-magnesium catalysts (TMCs) of composition TiCl4/MgCl2 with a low titanium content (<= 0.1 wt%) after their interaction with different aluminum trialkyls (AlR3). These catalysts strongly differ from conventional TMCs with titanium contents of 1-3 wt%, which produce a set of isolated or associated Ti(II) and Ti(III) species after the interaction with the AlR3. A correlation is found between the content of the isolated Ti(III) ions and the activity in ethylene polymerization. According to temperature rising elution fractionation (TREF) data, the catalysts with a low titanium content (isolated Ti(III) ions) mainly produce polypropylene with a very high atactic-fraction content. Organic products formed on the interaction of AlEt3 and AlMe3 with TMC are identified. The data obtained allow a scheme of Ti3+ and Ti2+ compounds formed in these catalysts to be proposed.
Библиографическая ссылка: Mikenas T.B. , Koshevoy E.I. , Zakharov V.A. , Nikolaeva M.I.
Formation of Isolated Titanium(III) Ions as Active Sites of Supported Titanium-Magnesium Catalysts for Polymerization of Olefins
Macromolecular Chemistry and Physics. 2014. V.215. N18. P.1707-1720. DOI: 10.1002/macp.201400142 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
Поступила в редакцию: 14 мар. 2014 г.
Принята к публикации: 17 апр. 2014 г.
Опубликована online: 21 мая 2014 г.
Опубликована в печати: 1 сент. 2014 г.
Идентификаторы БД:
Web of science: WOS:000342622800003
Scopus: 2-s2.0-84915825372
РИНЦ: 24013647
Chemical Abstracts: 2014:849242
Chemical Abstracts (print): 161:629109
OpenAlex: W2051848875
Цитирование в БД:
БД Цитирований
Web of science 23
Scopus 26
РИНЦ 25
OpenAlex 24
Альметрики: