Study on the Copolymerization of Ethylene/Norbornene with-Diketiminato Nickel Bromide Complexes

Researchers are interested in the study of catalytic system of ethylene/norbornene due to the excellent properties and the wide applications of copolymer material.Copolymerization of ethylene and norbornene with β-diketiminate nickel catalytic system is studied.The influence of the monomer ratio to the activity and the molecular weight are investigated.Results show the highest activity of 1.92×104g·mol-1Ni h-1and the molecular weight of 3.12×104 g·mol-1 are obtained under 10×105 Pa of ethylene pressure and 8 g of norbornene content.The 13CNMR spectra of the copolymer indicate random ethylene/norbornene copolymer is obtained with the catalytic system.