高等学校化学学报2011，Vol.32Issue(5)：1200-1204,5.
含溴α-二亚胺镍(Ⅱ)配合物的合成、表征及催化乙烯聚合反应
Synthesis and Characterization of α-Diimine Nickel(Ⅱ) Catalyst Containing Br Groups for Ethylene Polymerization
摘要
Abstract
A new Br-substituted α-diimine compound and its corresponding Ni ( Ⅱ ) complex, {bis[N,N′( 3-bromo-2,4,6-trimethylphenyl )imino] acenaphthene} dibromonickel, were successfully synthesized and characterized by 1H NMR, 13C NMR, elemental analysis, FTIR and XPS. The pre-catalyst 2 activated by methylaluminoxane(MAO) was tested in the polymerization of ethylene. The results show that the catalyst exhibits highly activity[55 g PE/( mol Ni· h · Pa)]. The catalyst system 2/MAO shows the highest activity with the 800 of AL/Ni molar ratio at 25 ℃. It is found that the catalyst containing electron-withdrawing groups Br shows better thermal stability and almost the same catalytic activity as the one without groups Br. At the same time, branching degree is increased in the presence of electron-withdrawing groups Br.关键词
含溴α-二亚胺/镍(Ⅱ)配合物/乙烯聚合/支化聚乙烯Key words
α-Diimine ligand Bromo-containing/ Nickel(Ⅱ) complexe/ Ethylene polymerization/ Branched polyethylene分类
化学化工引用本文复制引用
袁建超,梅铜简,王学虎,刘玉凤..含溴α-二亚胺镍(Ⅱ)配合物的合成、表征及催化乙烯聚合反应[J].高等学校化学学报,2011,32(5):1200-1204,5.基金项目
国家自然科学基金(批准号:20964003)、2009年教育部留学回国人员科研启动基金(批准号:[2009]1341)和2009年人力资源和社会保障部留学人员科技活动项目择优资助项目(批准号:2009[416])资助. （批准号:20964003）
