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Ethylene Polymerization over Supported Titanium-Magnesium Catalysts: Effect of Polymerization Parameters on the Molecular Weight Distribution of Polyethylene Научная публикация

Журнал Journal of Applied Polymer Science
ISSN: 0021-8995 , E-ISSN: 1097-4628
Вых. Данные Год: 2011, Том: 122, Номер: 5, Страницы: 3092-3101 Страниц : 10 DOI: 10.1002/app.34203
Ключевые слова kinetics (polym.), molecular weight distribution/molar mass distribution, polyethylene (PE), polymer synthesis and characterization, Ziegler-Natta polymerization
Авторы Nikolaeva Marina I. 1 , Mikenas Tatiana B. 1 , Matsko Mikhail A. 1 , Echevskaya Ludmila G. 1 , Zakharov Vladimir A. 1
Организации
1 Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Science, Pr. Akademika Lavrentieva, 5, Novosibirsk, Russia, 630090

Информация о финансировании (1)

1 Российский фонд фундаментальных исследований 10-03-00136

Реферат: The data on the effects of polymerization duration, cocatalyst, and monomer concentrations upon ethylene polymerization in the absence of hydrogen, and the effect of an additional chain transfer agent (hydrogen) on the molecular weight (MW), molecular weight distribution (MWD), and content of vinyl terminal groups for polyethylene (PE) produced over the supported titanium-magnesium catalyst (TMC) are obtained. The effects of these parameters on nonuniformity of active sites for different chain transfer reactions are analyzed by deconvolution of the experimental MWD curves into Flory components. It has been shown that the polymer MW grows, the MWD becomes narrower and the content of vinyl terminal groups in PE increases with increasing polymerization duration. It is assumed to occur due to the reduction of the rate of chain transfer with AlEt3 with increasing polymerization duration. The polydispersity of PE is found to rise with increasing AlEt3 concentration and decreasing monomer concentration due to the emergence of additional low molecular weight Flory components. The ratios of the individual rate constants of chain transfer with AlEt3, monomer and hydrogen to the propagation rate constant have been calculated.
Библиографическая ссылка: Nikolaeva M.I. , Mikenas T.B. , Matsko M.A. , Echevskaya L.G. , Zakharov V.A.
Ethylene Polymerization over Supported Titanium-Magnesium Catalysts: Effect of Polymerization Parameters on the Molecular Weight Distribution of Polyethylene
Journal of Applied Polymer Science. 2011. V.122. N5. P.3092-3101. DOI: 10.1002/app.34203 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
Поступила в редакцию: 14 окт. 2010 г.
Принята к публикации: 24 янв. 2011 г.
Опубликована online: 7 июл. 2011 г.
Опубликована в печати: 5 дек. 2011 г.
Идентификаторы БД:
Web of science: WOS:000295538600030
Scopus: 2-s2.0-80052395142
РИНЦ: 18003541
Chemical Abstracts: 2011:854633
Chemical Abstracts (print): 155:484544
OpenAlex: W2119623772
Цитирование в БД:
БД Цитирований
Web of science 39
Scopus 41
РИНЦ 40
OpenAlex 44
Альметрики: