Abstract
The boron trifluoride etherate, BF 3OEt 2, was used as an activator towards bis(acetylacetonate)palladium precursor in the polymerization of norbornene. The catalyst system Pd(Acac) 2/BF 3OEt 2 was highly active in the polymerization of norbornene. Catalytic activity up to 20,220 kg/(mol Pd · h) and intrinsic viscosities up to 2.64 dL/g were observed, respectively. Catalytic activity, polymer yield and polymer molecular weight could be controlled by varying the reaction parameters. The molar mass distribution indicates a single-site, highly homogeneous character of the active catalyst species. NMR spectroscopy study of the polymer showed exclusively 2,7-enchained repeating units of polymer backbone.
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