Syndiotactic crystalline dicyclopentadiene ring-opening polymer hydride, syndiotactic dicyclopentadiene ring-opening polymer, and methods for producing them.

摘要

The present invention is a hydrogenated syndiotactic crystalline dicyclopentadiene ring-opening polymer having a melting point of lower than 280°C, an initial melting temperature of 260°C or higher and a syndiotacticity of higher than 90%, and a syndiotactic dicyclopentadiene ring-opening polymer, and a method for producing the syndiotactic dicyclopentadiene ring-opening polyme, and a method for producing the hydrogenated syndiotactic crystalline dicyclopentadiene ring-opening polymer. One aspect of the invention provides a hydrogenated syndiotactic crystalline dicyclopentadiene ring-opening polymer having a sufficiently high initial melting temperature, excellent heat resistance and advantageous industrial producibility, a syndiotactic dicyclopentadiene ring-opening polymer that is excellent in solution stability after polymerization reaction and can be converted into the hydrogenated product by hydrogenation reaction, and an efficient production method thereof.