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Study of the Compositional Heterogeneity of Ethylene/1–Hexene Copolymers Produced over Supported Catalysts of Different Composition Научная публикация

Журнал Journal of Applied Polymer Science
ISSN: 0021-8995 , E-ISSN: 1097-4628
Вых. Данные Год: 2012, Том: 126, Номер: 6, Страницы: 2017-2023 Страниц : 7 DOI: 10.1002/app.36643
Ключевые слова branched, copolymers, fractionation of polymers, molecular weight distribution/molar, Ziegler-Natta polymerization
Авторы Matsko Mikhail A. 1 , Echevskaya Ludmila G. 1 , Vanina Marina P. 1 , Nikolaeva Marina I. 1 , Mikenas Tatyana B. 1 , Zakharov Vladimir A. 1
Организации
1 Boreskov Institute of Catalysis SB RAS Prosp. Akademika Lavrentieva, 5, 630090 Novosibirsk, Russia

Информация о финансировании (1)

1 Российский фонд фундаментальных исследований 10-03-00136

Реферат: Separation into narrow MWD fractions (liquid–liquid fractionation) and preparative TREF (temperature rising elution fractionation) with subsequent analysis of fractions by GPC, FTIR, and 13C NMR spectroscopy were used to study the comonomer distribution of ethylene/1–hexene copolymers produced over highly active supported titanium- and vanadium-magnesium catalysts (TMC and VMC) and a supported zirconocene catalyst. These catalysts produce PE with different MWD: Mw/Mn values vary from 2.9 for zirconocene catalyst, 4.0 for TMC, and 15 for VMC. 1-Hexene increases polydispersity to 25 for copolymer produced over VMC and hardly affects MWD of the copolymer produced over TMC and zirconocene catalysts. The most broad short chain branching distribution (SCBD) was found for ethylene/1–hexene copolymers produced over TMC. VMC and supported zirconocene catalyst produce copolymers with uniform profile of SCB content vs. molecular weight in spite of great differences in Mw/Mn values (22 and 2.5 respectively). TREF data showed that majority of copolymer produced over supported zirconocene catalyst was eluted at 70–90°C (about 85 wt %). In the case of VMC copolymer's fractions were eluted in the broad temperature interval (40–100°C). Accordingly, TREF data indicate a more homogeneous SCBD in copolymer, produced over supported zirconocene catalyst.
Библиографическая ссылка: Matsko M.A. , Echevskaya L.G. , Vanina M.P. , Nikolaeva M.I. , Mikenas T.B. , Zakharov V.A.
Study of the Compositional Heterogeneity of Ethylene/1–Hexene Copolymers Produced over Supported Catalysts of Different Composition
Journal of Applied Polymer Science. 2012. V.126. N6. P.2017-2023. DOI: 10.1002/app.36643 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
Поступила в редакцию: 28 мар. 2011 г.
Принята к публикации: 7 дек. 2011 г.
Опубликована online: 26 июн. 2012 г.
Опубликована в печати: 15 дек. 2012 г.
Идентификаторы БД:
Web of science: WOS:000308578500025
Scopus: 2-s2.0-84866264497
РИНЦ: 22126856
Chemical Abstracts: 2012:914641
Chemical Abstracts (print): 157:577695
OpenAlex: W1996505905
Цитирование в БД:
БД Цитирований
Web of science 21
Scopus 22
РИНЦ 22
OpenAlex 22
Альметрики: