PROCESSES FOR PRODUCING NORBORNENE OPEN-RING POLYMERS AND HYDROGENATED NORBORNENE OPEN-RING POLYMERS

摘要

A crystalline open-ring polymer is produced by ring-opening polymerization of a norbornene monomer through metathesis with a polymerization catalyst comprising both a product of reaction of a specific transition metal halide or oxyhalide with a substituted phenol or phenoxide and an organometallic reducing agent. Further, hydrogenation of the obtained polymer gives a crystalline hydrogenated open-ring polymer. When a novel polymerization catalyst comprising an aromatic dioxy ligand is used as the polymerization catalyst, highly crystalline norbornene open-ring polymers can be produced. Additionally, products of hydrogenation of them also exhibit high crystallinity.