SiO_(2)-Supported Ni(II)and Fe(II)Catalysts Bearing Sodium-Sulfonate Group for Olefin Polymerization  

作　　者：Yao Sun Quan Wang Yao Pan Wenmin Pang Chen Zou Min Chen 

机构地区：[1]CAS Key Laboratory of Soft Matter Chemistry,Department of Polymer Science and Engineering,University of Science and Technology of China,Hefei,Anhui 230026,China [2]Institutes of Physical Science and Information Technology,Anhui University,Hefei,Anhui 230601,China

出　　处：《Chinese Journal of Chemistry》2022年第23期2773-2779,共7页中国化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(NSFC,U19B6001,21971230,22101274 and U1904212);the China Postdoctoral Science Foundation(2021M703072);We are also grateful for the mentorship and strongly support from Professor Changle Chen(USTC).

摘　　要：Heterogeneous catalysts have been dominant for industrial polyolefin production,offering many distinct advantages,such as controlling the morphology of the polymer and preventing reactor fouling.In this contribution,we designed several types of imine ligands bearing sodium-sulfonate ionic groups and the corresponding nickel/iron catalysts.These catalysts could be immobilized on SiO_(2)with strong affinity and high catalyst loadings.The SiO_(2)-supported catalysts behaved better than their homogeneous counterparts during ethylene polymerization with extremely high activity(2.6×10^(4)kg·mol^(−1)·h^(−1))and high thermal stability.In addition,the supported nickel catalysts generated free-flowing polyethylene with high molecular weight(Mn up to 2.65×10^(3)kg·mol^(–1))and excellent morphology control,indicating no reactor fouling due to the leaching of catalyst.Moreover,for copolymerization,immobilized nickel catalysts showed a higher tolerance of polar monomers,and the efficient copolymerization of ethylene with undecylenic acid was achieved with high activity(450 kg·mol^(−1)·h^(−1))and a high incorporation ratio(up to 12.3%).

关 键 词：Heterogeneous catalysis Nickel iron catalysts Sodium-sulfonate group Polymerization COPOLYMERIZATION 

分 类 号：O64[理学—物理化学]