Norbornene-based polymer film, and retardation film, polarizing plate and liquid crystal display device using a polymer film

摘要

A film comprising norbornene-based polymer has a repeating unit represented by the following formula (1): wherein L represents a single bond or an alkylene group having 1 to 10 carbon atoms, R represents alkyl group having 2 to 10 carbon atoms, R¹, R² and R³ each represent a hydrogen atom or a substituent group.