Achieving Branched Polyethylene Waxes by Aryliminocycloocta[b]Pyridylnickel Precatalysts: Synthesis, Characterization, and Ethylene Polymerization

	Achieving Branched Polyethylene Waxes by Aryliminocycloocta[b]Pyridylnickel Precatalysts: Synthesis, Characterization, and Ethylene Polymerization
	Zhang, Randi 1,2,3; Wang, Zheng 1,2,4; Flisak, Zygmunt 1,2,5; Hao, Xiang 1,2; Liu, Qingbin 4; Sun, Wen-Hua1,2,3
刊名	JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
	2017-08-15
卷号	55 期号:16 页码:2601-2610
关键词	Cationic Polymerization Nickel Complex Polyethylene 10-aryliminocycloocta[b] Pyridine
英文摘要	Cycloocta[b] pyridin-10-one was prepared to form the corresponding imino derivatives, which then reacted with (DME) NiBr2 to form 10-aryliminocycloocta[b] pyridylnickel bromides (Ni1-Ni5). The new compounds were characterized by means of FT-IR spectroscopy as well as elemental analysis and the organic ligands were also analyzed by the NMR measurements. Furthermore, the molecular structure of a representative complex Ni3 was determined by the single crystal X-ray diffraction, indicating the distorted tetrahedral geometry around the nickel atom. Upon the activation with either methylaluminoxane (MAO) or diethylaluminium chloride (Et2AlCl), the title nickel complexes exhibited high activity in ethylene polymerization and produced polyethylene of low molecular weight (1.43-6.78 kg mol 21) and low dispersity (1.7-2.4), which suggests a single-site catalytic system. More importantly, the microstructure of the resultant polyethylene (especially degree of branching) and certain physical properties, such as T-m values, can easily be modulated by selecting the proper substituents within the ligands and adjusting the polymerization conditions. This finding demonstrates that it is plausible to use a single catalyst for synthesizing different types of polyethylene on demand. 10-Aryliminocycloocta[b] pyridylnickel bromides (Ni1-Ni5), upon activation with either MAO or Et2AlCl, exhibited high activity towards ethylene polymerization and produced polyethylenes with low molecular weight (1.43-6.78 kg mol(-1)) and low dispersity (1.7-2.4). (C) 2017 Wiley Periodicals, Inc.
语种	英语
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/38966]
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.Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050024, Hebei, Peoples R China 5.Univ Opole, Fac Chem, Oleska 48, PL-45052 Opole, Poland
推荐引用方式 GB/T 7714	Zhang, Randi,Wang, Zheng,Flisak, Zygmunt,et al. Achieving Branched Polyethylene Waxes by Aryliminocycloocta[b]Pyridylnickel Precatalysts: Synthesis, Characterization, and Ethylene Polymerization[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2017,55(16):2601-2610.
APA	Zhang, Randi,Wang, Zheng,Flisak, Zygmunt,Hao, Xiang,Liu, Qingbin,&Sun, Wen-Hua.(2017).Achieving Branched Polyethylene Waxes by Aryliminocycloocta[b]Pyridylnickel Precatalysts: Synthesis, Characterization, and Ethylene Polymerization.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,55(16),2601-2610.
MLA	Zhang, Randi,et al."Achieving Branched Polyethylene Waxes by Aryliminocycloocta[b]Pyridylnickel Precatalysts: Synthesis, Characterization, and Ethylene Polymerization".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 55.16(2017):2601-2610.