New catalysts for the polymerization of cyclic olefins

Abstract

Abstract Various routes to high T g thermoplastic materials based on the Ziegler‐Natta catalyzed polymerization of norbornene‐type monomers are described. These routes involve both ring‐opening metathesis polymerization (ROMP) and addition polymerization. New catalysts, and a new catalytically‐active metal (cobalt), for both ROMP and the addition homopolymerization of norbornene‐type monomers are reported.