Remote dibenzocycloheptyl-substitution of an iminotrihydroquinoline-nickel catalyst as a route to narrowly dispersed branched polyethylene waxes with alkene functionality
文献类型：期刊论文
| 作者 | Guo, LW; Zhu, DZ; Zhang, WJ; Zada, M; Solan, GA; Hao, X; Sun, WH
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| 刊名 | EUROPEAN POLYMER JOURNAL
 |
| 出版日期 | 2018-10-01 |
| 卷号 | 107页码:315-328 |
| 关键词 | Nickel complex Ethylene polymerization Unsaturated polyethylene waxes Epoxidation |
| ISSN号 | 0014-3057 |
| DOI | 10.1016/j.eurpolymj.2018.09.007 |
| 英文摘要 | The 8-(arylimino)-5,6,7-trihydroquinoline-nickel(II) chlorides, [8-N(2,6-R-2-4-(C15H13)C6H2}C9H8N]NiCl2 (R = Me Nil, Et Ni2, i-Pr Ni3, F Ni4, Cl Ni5), each appended with a remote para-dibenzocycloheptyl group, have been synthesized from either the pre-formed ligand (Nil-Ni3) or by generating the ligand in-situ during complexation (Ni4, Ni5). The molecular structures of Ni2 and Ni3 adopt dimeric or trimeric forms in the solid state, in which the chlorides can act as doubly or triply bridging ligands. On treatment with either MMAO or Et2AlCl:, Nil-Ni5 showed low (Ni4, Ni5) to high activities (Nil-Ni3: up to 4.58 x 10(6) g PE mol(-1) (Ni) h(-1)) for ethylene polymerization producing unsaturated polyethylenes of low molecular weight (1.4-2.7 kg center dot mol(-1)) and narrow dispersity ( < 2.0). In the main, these polyethylene waxes are highly branched and contain relatively high levels of internal vinylenes (-CH=CH-) with respect to terminal vinyls (-CH=CH2). The ortho-substituents of the precatalyst were found to not only affect the catalytic activity but also the vinylene:vinyl ratio and the branching content. Notably, the materials generated using ortho-fluoro Ni4/Et2AlCl possessed the least number of branches and an increased vinyl contribution. Furthermore, these unsaturated polyethylenes can be readily functionalized by epoxidation with almost quantitative conversion. |
| 语种 | 英语 |
| WOS记录号 | WOS:000450376300034 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/41962]  |
| 专题 | 化学研究所_工程塑料实验室 |
| 作者单位 | 1.Zhang, WJ 2.Solan, GA 3.Sun, WH (reprint author), Chinese Acad Sci, Inst Chem, Key Lab Engn Plast, Beijing 100190, Peoples R China. 4.Zhang, WJ 5.Solan, GA 6.Sun, WH (reprint author), Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Guo, LW,Zhu, DZ,Zhang, WJ,et al. Remote dibenzocycloheptyl-substitution of an iminotrihydroquinoline-nickel catalyst as a route to narrowly dispersed branched polyethylene waxes with alkene functionality[J]. EUROPEAN POLYMER JOURNAL,2018,107:315-328. |
| APA | Guo, LW.,Zhu, DZ.,Zhang, WJ.,Zada, M.,Solan, GA.,...&Sun, WH.(2018).Remote dibenzocycloheptyl-substitution of an iminotrihydroquinoline-nickel catalyst as a route to narrowly dispersed branched polyethylene waxes with alkene functionality.EUROPEAN POLYMER JOURNAL,107,315-328. |
| MLA | Guo, LW,et al."Remote dibenzocycloheptyl-substitution of an iminotrihydroquinoline-nickel catalyst as a route to narrowly dispersed branched polyethylene waxes with alkene functionality".EUROPEAN POLYMER JOURNAL 107(2018):315-328. |
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来源：化学研究所
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