Amine-imine palladium catalysts for living polymerization of ethylene and copolymerization of ethylene with methyl acrylate: incorporation of acrylate units into the main chain and branch end

被引：54
作者：
Hu, Haibin [1 ]
Chen, Darui [1 ]
Gao, Haiyang [1 ]
Zhong, Liu [1 ]
Wu, Qing [1 ]
机构：
[1] Sun Yat Sen Univ, Inst Polymer Sci, Sch Chem & Chem Engn, PCFM Lab,GD HPPC Lab,DSAPM Lab, Guangzhou 510275, Guangdong, Peoples R China
来源：
POLYMER CHEMISTRY | 2016年 / 7卷 / 03期
基金：
中国国家自然科学基金;
关键词：
MOLECULAR-WEIGHT POLYETHYLENE; BETA-DIKETIMINATO NI(II); DIIMINE NICKEL-CATALYST; ALPHA-OLEFINS; INSERTION POLYMERIZATION; ELEVATED-TEMPERATURES; RAFT POLYMERIZATION; METAL CATALYSTS; LIGAND; COMPLEXES;
D O I：
10.1039/c5py01743b
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Neutral and cationic palladium complexes bearing an amine-imine ligand with different donor functionalities have been synthesized and characterized. Cationic amine-imine palladium complexes can be directly employed in the homopolymerization of ethylene and the copolymerization of ethylene and methyl acrylate (MA) without any cocatalysts. A thermally stable amine-imine palladium catalyst with two bulky 2,6-diisopropyl substituents can catalyze ethylene polymerization in a living fashion at 25 degrees C to afford branched polyethylene. The copolymerization of ethylene and MA using a bulky amine-imine palladium catalyst affords branched copolymers with a 3-fold increased incorporation of MA relative to those obtained by an a-diimine palladium analogue. Both direct incorporation of an acrylate unit into the main chain and migratory incorporation of the terminal acrylate unit can be observed.
引用
收藏
页码：529 / 537
页数：9
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