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

页码：529 / 537

页数：9

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