Highly Active New α-Diimine Nickel Catalyst for Polymerization of Ethylene

被引：0

作者：

Yuan Jian-chao ^{[1
]}

Liu Yu-feng ^{[1
]}

Mei Tong-jian ^{[1
]}

Wang Xue-hu ^{[1
]}

机构：

[1] NW Normal Univ, Key Lab Ecoenvironm Related Polymer Mat, Coll Chem & Chem Engn, Minist Educ,Gansu Key Lab Polymer Mat, Lanzhou 730070, Peoples R China

来源：

CHEMICAL RESEARCH IN CHINESE UNIVERSITIES | 2011年 / 27卷 / 06期

基金：

中国国家自然科学基金;

关键词：

alpha-Diimine nickel(II) complex; Diethylaluminium chloride; Late transition metal catalyst; Ethylene polymerization; LATE-METAL-CATALYSTS; OLEFIN POLYMERIZATION; (ALPHA-DIIMINE)NICKEL(II) COMPLEXES; STRUCTURAL-CHARACTERIZATION; OLIGOMERIZATION; LIGANDS; COPOLYMERIZATION; SUBSTITUENTS; PRECURSORS; MECHANICS;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new alpha-diimine ligand la, bis[N,N'-(4-tert-butyl-2,6-dimethylphenyl)imino]-2,3-butanediylidene and its corresponding Ni(II) complex 2a, {bis[N,N'-(4-tert-butyl-2,6-dimethylphenyl)imino]-2,3-butanediylidene}dibromo-nickel were successfully synthesized, and characterized by (1)H NMR, (13)C NMR, Fourier transform infrared spectroscope(FTIR), elemental analysis and X-ray photoelectron spectroscopy(XPS). alpha-Diimine ligand 1b, bis[N,N'-(2,6-dimethylphenypimino]-2,3-butanediyhdene and its corresponding Ni(II) complex 2b, {bis[N,N'-(2,6-dimethylphenyl)imino]-2,3-butanediylidene}dibromonickel were also synthesized and characterized for comparison. The pre-catalyst 2a with sterically bulky, electron-donating group tert-butyl, activated by diethylaluminum chloride (DEAC) and tested in the polymerization of ethylene, was very highly active[2.01 x10(7) g PE/(mol Ni.h.01 MPa)] and led to a very highly branched polyethylene(ca. 35-103 branches/1000 C). The state of the polyethylene obtained varied from plastic, elastomer polymers to the oil-like hyperbranched polymers.

引用

页码：1014 / 1018

页数：5

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