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题名: Thermally stable and highly active cobalt precatalysts for vinyl-polyethylenes with narrow polydispersities: integrating fused-ring and imino-carbon protection into ligand design
作者: Huang, Fang1, 2, 3; Zhang, Wenjuan2, 3; Sun, Yang2, 3; Hu, Xinquan1; Solan, Gregory A.2, 3, 4; Sun, Wen-Hua2, 3, 5
刊名: NEW JOURNAL OF CHEMISTRY
发表日期: 2016
卷: 40, 期:9, 页:8012-8023
收录类别: SCI
英文摘要: A series of [2-(1-aryliminobenzylidene)-9-arylimino-5,6,7,8-tetrahydrocyclohepta[b]pyridyl]cobalt chlorides (aryl = 2,6-Me2Ph (Co1), 2,6-Et2Ph (Co2), 2,6-i-Pr2Ph (Co3), 2,4,6-Me3Ph (Co4), and 4-Me-2,6-Et2Ph (Co5)), incorporating a fused seven-membered ring and an imino C-phenyl group, was synthesized and characterized. Upon activation with methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), Co1-Co5 all showed high activities toward ethylene polymerization with the Co4/MAO system showing the highest activity (8.65 x 10(6) g(PE) mol(-1)(Co) h(-1)). Significantly, these systems exhibited good thermal stability (up to 80 degrees C) as well as long catalytic lifetimes. The polyethylenes obtained all contained vinyl end-groups as well as narrow polydispersities. These phenyl-modified cobalt precatalysts provide a functional system for generating a unique class of vinyl-polyethylenes due to their ease of preparation, high catalytic activities and thermally stable polymerization.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35255
Appears in Collections:工程塑料实验室_期刊论文

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作者单位: 1.Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Zhejiang, Peoples R China
2.Chinese Acad Sci, Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, Beijing 100190, Peoples R China
4.Univ Leicester, Dept Chem, Univ Rd, Leicester LE1 7RH, Leics, England
5.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China
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