Molecular weight control of polyethylene waxes using a constrained imino-cyclopenta[b]pyridyl-nickel catalyst
文献类型：期刊论文
| 作者 | Wang, Zheng1,2,3; Zhang, Youfu3,4; Ma, Yanping1,2; Hu, Xinquan4; Solan, Gregory A.3,5; Sun, Yang1,2; Sun, Wen-Hua1,2,3
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| 刊名 | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
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| 出版日期 | 2017-10-15 |
| 卷号 | 55期号:20页码:3494-3505 |
| 关键词 | n N-imino-cyclopenta[b]Pyridines Polyethylene (Pe) Cationic Polymerization Catalysis Nickel |
| 英文摘要 | Five examples of nickel(II) bromide complexes bearing N,N-imino-cyclopenta[b]pyridines, [7-(ArN)-6,6-Me2C8H5N]NiBr2 (Ar=2,6-Me2C6H3 (Ni1), 2,6-Et2C6H3 (Ni2), 2,6-i-Pr2C6H3 (Ni3), 2,4,6-Me3C6H2 (Ni4), 2,6-Et-2-4-MeC6H2 (Ni5)), have been prepared by the reaction of the corresponding ligand, L1-L5, with NiBr2(DME) (DME=1,2-dimethoxyethane). On crystallization from bench dichloromethane, Ni1 underwent adventitious reaction with water to give the aqua salt, [L1NiBr(OH2)(3)][Br] (Ni1'). The molecular structures of Ni1' and Ni3 have been structurally characterized, the latter revealing a bromide-bridged dimer. On activation with either MMAO or Et2AlCl, Ni1, Ni2, Ni4, and Ni5, all exhibited high activities for ethylene polymerization (up to 3.88 x 10(6) g(PE)mol(-1)(Ni)h(-1)); the most sterically bulky Ni3 gave only low activity. Polyethylene waxes are a feature of the materials obtained which typically display low molecular weights (M(w)s), narrow M-w distributions and unsaturated vinyl and vinylene functionalities. Notably, the catalyst comprising Ni1/Et2AlCl produced polyethylene with the lowest M-w, 0.67 kgmol(-1), which is less than any previously reported data for any class of cycloalkyl-fused pyridine-nickel catalyst. (c) 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 3494-3505 |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/39312]  |
| 专题 | 化学研究所_工程塑料实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Beijing 100049, Peoples R China 4.Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Zhejiang, Peoples R China 5.Univ Leicester, Dept Chem, Univ Rd, Leicester LE1 7RH, Leics, England |
| 推荐引用方式 GB/T 7714 | Wang, Zheng,Zhang, Youfu,Ma, Yanping,et al. Molecular weight control of polyethylene waxes using a constrained imino-cyclopenta[b]pyridyl-nickel catalyst[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2017,55(20):3494-3505. |
| APA | Wang, Zheng.,Zhang, Youfu.,Ma, Yanping.,Hu, Xinquan.,Solan, Gregory A..,...&Sun, Wen-Hua.(2017).Molecular weight control of polyethylene waxes using a constrained imino-cyclopenta[b]pyridyl-nickel catalyst.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,55(20),3494-3505. |
| MLA | Wang, Zheng,et al."Molecular weight control of polyethylene waxes using a constrained imino-cyclopenta[b]pyridyl-nickel catalyst".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 55.20(2017):3494-3505. |
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来源：化学研究所
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