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Activity and Stability Spontaneously Enhanced Toward Ethylene Polymerization by Employing 2-(1-(2,4-Dibenzhydrylnaphthylimino) Ethyl)-6-(1-(Arylimino) Ethyl) Pyridyliron(II) Dichlorides
Zhao, Weizhen1; Yue, Erlin1,2; Wang, Xinxin1; Yang, Wenhong1; Chen, Yan1; Hao, Xiang1; Cao, Xiaoping2; Sun, Wen-Hua1
2017-03-01
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume55Issue:6Pages:988-996
AbstractA series of 2-(1-(2,4-dibenzhydrylnaphthylimino) ethyl)6-(1-(arylimino) ethyl) pyridyliron(II) complexes (Fe1-Fe5) was synthesized and characterized. The molecular structure of the representative Fe2 was determined by single-crystal X-ray diffraction, revealing a distorted pseudo-square-pyramidal geometry around the iron center. On activation with eithermethyl aluminoxane (MAO) or modified methylaluminoxane (MMAO), all these iron complex precatalysts performed with high activities (up to 1.58 x 10(7) g (PE) mol(-1) (Fe) h(-1)) toward ethylene polymerization, producing highly linear polyethylenes with highmolecular weight and bimodal distribution, which was in accordance with high temperature C-13 NMR, high T-m values (T-m similar to 130 degrees C) and the GPC curves of the obtained polyethylenes. Meanwhile, DFT calculation results also showed the good correlation between net charges on iron and experimental activities. Compared with previous bis(imino) pyridyliron analogues, the current iron complexes containing the benzhydrylnaphthyl groups exhibited relatively higher activities and better thermalstability at elevated temperatures, especially at 80 degrees C as the industrial operating temperature, and still showed high activities toward ethylene polymerization up to 8.57 x 10(6) g (PE) mol(-1) (Fe) h(-1) in the presence of co-catalyst MMAO. In addition, these iron complex precatalysts all exhibited long lifetimes. (C) 2017 Wiley Periodicals, Inc.
KeywordCalculations Ethylene Polymerization Linear Polyethylenes (Pe) High Molecular Weight Iron Complexes
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/38118
Collection工程塑料实验室
Affiliation1.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Engn Plast, Beijing 100190, Peoples R China
2.Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Weizhen,Yue, Erlin,Wang, Xinxin,et al. Activity and Stability Spontaneously Enhanced Toward Ethylene Polymerization by Employing 2-(1-(2,4-Dibenzhydrylnaphthylimino) Ethyl)-6-(1-(Arylimino) Ethyl) Pyridyliron(II) Dichlorides[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2017,55(6):988-996.
APA Zhao, Weizhen.,Yue, Erlin.,Wang, Xinxin.,Yang, Wenhong.,Chen, Yan.,...&Sun, Wen-Hua.(2017).Activity and Stability Spontaneously Enhanced Toward Ethylene Polymerization by Employing 2-(1-(2,4-Dibenzhydrylnaphthylimino) Ethyl)-6-(1-(Arylimino) Ethyl) Pyridyliron(II) Dichlorides.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,55(6),988-996.
MLA Zhao, Weizhen,et al."Activity and Stability Spontaneously Enhanced Toward Ethylene Polymerization by Employing 2-(1-(2,4-Dibenzhydrylnaphthylimino) Ethyl)-6-(1-(Arylimino) Ethyl) Pyridyliron(II) Dichlorides".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 55.6(2017):988-996.
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