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Addition Polymerization of 5-Ethylidene-2-Norbornene in the Presence of Pd N-Heterocyclic Carbene Complexes
Authors:G O Karpov  E V Bermesheva  A V Zudina  A F Asachenko  L I Minaeva  M A Topchiy  P S Gribanov  M S Nechaev  M V Bermeshev
Institution:1.Topchiev Institute of Petrochemical Synthesis,Russian Academy of Sciences,Moscow,Russia;2.Sechenov First Moscow State Medical University (1st MSMU),Ministry of Health of the Russian Federation,Moscow,Russia;3.OOO INSILIKO,Moscow,Russia;4.Moscow State University,Moscow,Russia;5.Mendeleev University of Chemical Technology of Russia,Moscow,Russia
Abstract:New high-performance catalytic systems based on Pd N-heterocyclic carbene complexes for the selective addition polymerization of 5-ethylidene-2-norbornene (ENB) were proposed. With these catalysts, polymerization can be conducted at unprecedentedly high monomer/catalyst ratio (up to 5 × 105/1) and gives high-molecular-weight soluble polymers with good film-forming properties. Varying the polymerization conditions (reaction temperature, monomer and catalyst concentrations, monomer/Pd ratio) makes it possible to prepare soluble ENB-based addition polymers with specified molecular weights in reasonable yields.
Keywords:
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