The annular kabonato region in

摘要

PROBLEM TO BE SOLVED: To provide a new cyclic olefin-based ring-opened polymer having no or little volumetric shrinkage by polymerization and capable of forming a crosslinked polymer exhibiting no or little volumetric shrinkage by crosslinking, to provide a method for producing the polymer, to provide the crosslinked polymer, and to provide a method for producing the crosslinked polymer.;SOLUTION: The cyclic olefin-based ring-opened polymer has a structural unit represented by chemical formula (1) as a repeating unit.;COPYRIGHT: (C)2010,JPO&INPIT