Ethylene polymerization by salicylaldimine Nickel(II) complexes derived from arylnaphthylamine

详细信息    查看全文

• 作者：Pinjun Ji ; Lihua Guo ; Xiaohui Hu ; Weimin Li
• 关键词：Ethylene polymerization ; Salicylaldimine ; Nickel(II) ; Polyethylene
• 刊名：Journal of Polymer Research
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：24
• 期：2
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Polymer Sciences; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials;
• 出版者：Springer Netherlands
• ISSN：1572-8935
• 卷排序：24

文摘

A series of salicylaldimine ligands 2-tert-butyl-6-((2,4-bis(diphenylmethyl)-8-arylnaphthalen)imine)-phenol (L1: Aryl =4-tBu-phenyl; L2: Aryl = p-tolyl; L3: Aryl = phenyl; L4: 4-CF₃-phenyl) and the corresponding neutral salicylaldimine nickel complexes (Ni1-Ni4) were prepared and characterized. In ethylene polymerization at 20 °C, these nickel complexes are highly active, with activities of up to 6.88 × 105 g·mol−1·h−1. Moreover, the molecular weight of the polyethylene could reach up to 8.1 × 105. Comparing with the classic salicylaldimine nickel complexes Ni5 at 20 °C, complexes Ni1 with the 4-tBu-phenyl substituent demonstrated 8 times higher activity and 35 times higher polyethylene molecular weight.