Efficient Copolymerization of Ethylene with Polar Divinyl Monomer by Phosphino-Phenolate Nickel Catalyst  

作　　者：Fei Wang Xu-ling Wang Li Pan Bin Wang Yue-Sheng Li 

机构地区：[1]Tianjin Key Lab of Composite&Functional Materials,School of Material Science and Engineering,Tianjin University,Tianjin 300072,China [2]College of Chemistry and Chemical Engineering,Yantai University,Yantai,Shandong 264005,China

出　　处：《Chinese Journal of Chemistry》2023年第9期1037-1044,共8页中国化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.21690071).

摘　　要：Direct copolymerization of olefin with polar monomers via a coordination-insertion mechanism appears as the most efficient and at-tractive method to prepare functionalized polyolefins.Herein,we carried out direct copolymerization of ethylene and allyl acrylate by a bulky phosphino-phenolate nickel catalyst,in which high-molecular-weight copolymers bearing polar five-membered and six-membered ring structures were afforded.Comprehensive NMR and FT-I R analyses revealed multiplex structure of the obtained copolymers,in which both the noncyclic structural units bearing pendant allyl moiety(A)as well as acrylate moiety(B)and the cyclic structural units,y-butyrolactones(C)andδ-valerolactone(D)were found.Exhilaratingly,the content of different structural units of the produced copolymer could be tuned by adjusting the concentration of the comonomer.Moreover,we also proved that the nick-el-based catalyst could produce related copolymers with significantly enhanced copolymer molecular weights in the copolymeriza-tion of allyl acrylate and ethylene compared with the palladium-based catalyst under the same conditions.

关 键 词：Coordination and insertion COPOLYMERIZATION Nickel Polar monomer POLYOLEFIN 

分 类 号：O631.5[理学—高分子化学] O643.36[理学—化学]