Influence of Backbone and Axial Substituent of Catalyst onα-Imino-ketone Nickel Mediated Ethylene(Co)Polymerization  

作　　者：Yu-Kai Chu Xiao-Qiang Hu Yue Zhang Da-Jun Liu Yi-Xin Zhang Zhong-Bao Jian 

机构地区：[1]College of Chemistry and Environmental Engineering,Changchun University of Science and Technology,Changchun 130022,China [2]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 730022,China

出　　处：《Chinese Journal of Polymer Science》2022年第5期469-477,共9页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.22122110,21871250 and 22001244);the Jilin Provincial Science and Technology Department Program(No.20200801009GH)。

摘　　要：Theα-imino-ketone nickel catalyst is an emerging versatile platform that is easy to prepare and allows for the production of branched high molecular weight functionalized polyethylenes.However,study on this catalyst system is rare thus far.In this contribution,by introducing different backbones,flexible and rigid axial substituents into theα-imino-ketone framework,a family of cationic nickel catalysts were synthesized and fully characterized.Without the addition of any activator,systematic studies on ethylene polymerization and copolymerization with polar monomers were performed to explore the influence of both backbone and axial substituent on catalytic activity,polymer molecular weight,branching density and incorporation.In particular,owing to the unique semi-opening feature of theα-imino-ketone framework,the preferred nickel catalyst exhibited high activity of 175 kg·mol^(-1)·h^(-1)to produce functionalized polyethylene with molecular weight of 13.4 kg·mol^(-1)and comonomer incorporation of 2.9 mol%.

关 键 词：Olefin polymerization α-Imino-ketone ligand Nickel catalyst Polar monomer 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ426