Synthesis and Addition Polymerization of 5-Butoxymethylenyl-2-norbornene

5-Butoxymethylenyl-2-norbornene(NBE-CH 2 OC 4 H 9) was synthesized.Polynorbornenes with functional groups were obtained by homo and copolymerizations of norbornene derivatives catalyzed by bis(β-ketonaphthylamino)Ni(Ⅱ)/B(C 6 F 5) 3 system.Influences on polymerizations by changing polymerization time and copolymerization monomer feed ratios was examined.The catalytic bis(β-ketonaphthylamino)Ni(Ⅱ)/B(C 6 F 5) 3 system exhibited higher catalysis activity.The obtained polymers were characterized by 1 H NMR,FTIR and TGA.Results indicated that the incorporation rate could reach 22.1%~76.9% ether units at a molar fraction of 10%~90% of the NBE-CH 2 OC 4 H 9 in the monomer feed ratios;the polymerizations are confirmed to be vinyl-addition mode.The polymer has a good thermal stability(T d 360 ℃) and is soluble in many common solvents,such as THF and CHCl 3.