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Polynorbornenes were synthesized in the presence of an iron based catalyst, 2,6-bis[1-(2,6-diisopropyl-phenylimino)ethyl]pyridine iron(Ⅱ) dichloride. The FTIR, 1H NMR and 13C NMR analysis results revealed that the structure of the obtained polynorbornenes consisted of vinyl addition polymer substructures without any ring-opening structures. The polymers were amorphous with a short-range order, displayed in the WAXD(wide angle X-ray diffraction) diagrams. The glass transition temperatures ranged from 200 to 400 ℃. The effects of the polymerization reaction conditions, such as Al/Fe molar ratio and toluene/CH_2Cl_2 volume ratio, on the activity, intrinsic viscosity and T_g were also studied.
Polynorbornenes were synthesized in the presence of an iron based catalyst, 2,6-bis [1- (2,6-diisopropyl-phenylimino) ethyl] pyridine iron the structure of the obtained polynorbornenes consisted of vinyl addition polymer substructures without any ring-opening structures. The polymers were amorphous with a short-range order, displayed in the WAXD (wide angle X-ray diffraction) diagrams. The glass transition temperatures ranged from 200 to 400 ° C. The effects of the polymerization reaction conditions, such as the Al / Fe molar ratio and the toluene / CH 2 Cl 2 volume ratio, on the activity, intrinsic viscosity and T_g were also studied.