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Balancing high thermal stability with high activity in diaryliminoacenaphthene-nickel(II) catalysts for ethylene polymerization
Chen, Yanjun1,2,3; Du, Shizhen2,3; Huang, Chuanbing2,3; Solan, Gregory A.2,3,4; Hao, Xiang2,3; Sun, Wen-Hua2,3,5
2017-06-15
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume55Issue:12Pages:1971-1983
AbstractThe N,N-diaryliminoacenaphthenes, 1,2-[2,4-{(4-FC6H4)(2)CH}(2)-6-MeC6H4N](2)-C2C10H6 (L1) and 1-[2,4-{(4-FC6H4)(2)CH}(2)-6-MeC6H4N]-2-(ArN)C2C10H6 (Ar=2,6-Me2C6H3 L2, 2,6-Et2C6H3 L3, 2,6-i-Pr2C6H3 L4, 2,4,6-Me3C6H2 L5, 2,6-Et-2-4-MeC6H2 L6), incorporating at least one N-2,4-bis(difluoro benzhydryl)-6-methylphenyl group, have been synthesized and fully characterized. Interaction of L1-L6 with (DME)NiBr2 (DME=1,2-dimethoxyethane) generates the corresponding nickel(II) bromide N,N-chelates, LNiBr2 (1-6), in high yield. The molecular structures of 3 and 6 reveal distorted tetrahedral geometries at nickel with the ortho-substituted difluorobenzhydryl group providing enhanced steric protection to only one side of the metal center. On activation with various aluminum alkyl co-catalysts, such as methylaluminoxane (MAO) or Et2AlCl, 1-6 displayed outstanding activity toward ethylene polymerization (up to 1.02 x 10(7) g of PE (mol of Ni)(-1) h(-1)). Notably 1, bearing equivalent fluorobenzhydryl-substituted N-aryl groups, was able in the presence of Et2AlCl to couple high activity with exceptional thermal stability generating high molecular weight branched polyethylenes at temperatures as high as 100 degrees C. (c) 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 1971-1983
KeywordBranched Cationic Polymerization Nickel Complex Polyethylene Thermal Properties
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/39026
Collection工程塑料实验室
Affiliation1.Ningbo Polytech, Dept Appl Chem Engn, Ningbo 315800, Zhejiang, Peoples R China
2.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, 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
Recommended Citation
GB/T 7714
Chen, Yanjun,Du, Shizhen,Huang, Chuanbing,et al. Balancing high thermal stability with high activity in diaryliminoacenaphthene-nickel(II) catalysts for ethylene polymerization[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2017,55(12):1971-1983.
APA Chen, Yanjun,Du, Shizhen,Huang, Chuanbing,Solan, Gregory A.,Hao, Xiang,&Sun, Wen-Hua.(2017).Balancing high thermal stability with high activity in diaryliminoacenaphthene-nickel(II) catalysts for ethylene polymerization.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,55(12),1971-1983.
MLA Chen, Yanjun,et al."Balancing high thermal stability with high activity in diaryliminoacenaphthene-nickel(II) catalysts for ethylene polymerization".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 55.12(2017):1971-1983.
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