2-AMINOMETHYLPYRIDINE NICKEL(Ⅱ) COMPLEXES—SYNTHESIS,MOLECULAR STRUCTURE AND CATALYSIS OF ETHYLENE POLYMERIZATION  

作　　者：伍青 

机构地区：[1]Institute of Polymer Science,School of Chemistry and Chemical Engineering,Sun Yat-Sen(Zhongshan)University,Guangzhou 510275,China

出　　处：《Chinese Journal of Polymer Science》2008年第5期567-573,共7页高分子科学（英文版）

基　　金：the National Natural Science Foundation of China(Nos.20674097,20734004);the Ministry of Education of China(Foundation for Ph.D.Training).

摘　　要：A series of new nickel(Ⅱ)complexes with 2-aminomethylpyridine ligands,(2-PyCH_2NHAr)_2NiBr_2(Ar=2,6- dimethylphenyl 2a;2,6-diisopropylphenyl 2b,2,6-difluorophenyl 2c),have been synthesized and used as catalyst precursors for ethylene polymerization in the presence of methylaluminoxane(MAO).The catalysts containing ortho-alkyl-substituents afford high molecular weight branched polyethylenes as well as a certain amount of oligomers.Enhancing the steric bulk of the alkyl substituent of the catalyst resulted in...A series of new nickel(Ⅱ)complexes with 2-aminomethylpyridine ligands,(2-PyCH_2NHAr)_2NiBr_2(Ar=2,6- dimethylphenyl 2a;2,6-diisopropylphenyl 2b,2,6-difluorophenyl 2c),have been synthesized and used as catalyst precursors for ethylene polymerization in the presence of methylaluminoxane(MAO).The catalysts containing ortho-alkyl-substituents afford high molecular weight branched polyethylenes as well as a certain amount of oligomers.Enhancing the steric bulk of the alkyl substituent of the catalyst resulted in...

关 键 词：2-Aminomethyipyridine Nickel（Ⅱ）complex CATALYST Ethylene polymerization Oligomer. 

分 类 号：O631.5[理学—高分子化学]