Origin of "Multisite-like" Ethylene Polymerization Behavior of the Single-Site Nonsymmetrical Bis(imino)pyridine Iron(II) Complex in the Presence of Modified Methylaluminoxane
文献类型：期刊论文
| 作者 | Semikolenova, Nina V.1; Sun, Wen-Hua2 ; Soshnikov, Igor E.1,3; Matsko, Mikhail A.1; Kolesova, Olga V.1,3; Zakharov, Vladimir A.1,3; Bryliakov, Konstantin P.1,3
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| 刊名 | ACS CATALYSIS
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| 出版日期 | 2017-04-01 |
| 卷号 | 7期号:4页码:2868-2877 |
| 关键词 | Bis(Imino)Pyridine Chain Transfer Ethylene Polymerization Mmao Molecular-weight Distribution Multisite Catalysts |
| 英文摘要 | A detailed study of the effect of reaction temperature, time, and cocatalyst composition on the ethylene polymerization performance of 2-[1-(2,6-dibenzhydryl-4-chlorophenylimino)ethyl]-6-(1-mesityliminoethyl)pyridyliron dichloride (1) is reported. In the presence of modified methylaluminoxane (MMAO), 1 behaves like a highly active, "multisite-like" ethylene polymerization catalyst, with the resulting polyethylenes having time-dependent bimodal-like molecular-weight distributions and featuring saturated (n-propyl- and i-butyl-terminated) chain ends. To readily distinguish between bimodal and bimodal-like molecular-weight distributions, we have proposed the use of the dN(f)/(d log M) log M representation further to the mainstream dW(f)/(d log M) log M one. The consensus mechanism of chain transfer and chain-end formation in the presence of MMAO has been proposed, which explains the composition and amount of terminal alkyl groups in the polymer, and the apparent "multisite-like" nature of the iron catalyst. A comparison between the catalytic behaviors of the "multisite-like" 1/MMAO catalyst system and the truly multisite catalyst system based on Brookhart's symmetrical bis(imino)pyridine iron catalyst 2 is given. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/38341]  |
| 专题 | 化学研究所_工程塑料实验室 |
| 作者单位 | 1.Boreskov Inst Catalysis, Pr Lavrentieva 5, Novosibirsk 630090, Russia 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China 3.Novosibirsk State Univ, Pirogova 2, Novosibirsk 630090, Russia |
| 推荐引用方式 GB/T 7714 | Semikolenova, Nina V.,Sun, Wen-Hua,Soshnikov, Igor E.,et al. Origin of "Multisite-like" Ethylene Polymerization Behavior of the Single-Site Nonsymmetrical Bis(imino)pyridine Iron(II) Complex in the Presence of Modified Methylaluminoxane[J]. ACS CATALYSIS,2017,7(4):2868-2877. |
| APA | Semikolenova, Nina V..,Sun, Wen-Hua.,Soshnikov, Igor E..,Matsko, Mikhail A..,Kolesova, Olga V..,...&Bryliakov, Konstantin P..(2017).Origin of "Multisite-like" Ethylene Polymerization Behavior of the Single-Site Nonsymmetrical Bis(imino)pyridine Iron(II) Complex in the Presence of Modified Methylaluminoxane.ACS CATALYSIS,7(4),2868-2877. |
| MLA | Semikolenova, Nina V.,et al."Origin of "Multisite-like" Ethylene Polymerization Behavior of the Single-Site Nonsymmetrical Bis(imino)pyridine Iron(II) Complex in the Presence of Modified Methylaluminoxane".ACS CATALYSIS 7.4(2017):2868-2877. |
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来源：化学研究所
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