| 摘要 |
PROBLEM TO BE SOLVED: To provide a retardation film that exhibits reverse wavelength dispersibility and has excellent stability of wavelength dispersibility in molding.SOLUTION: A retardation film comprises a resin composition (C) including a polymer (A) of negative intrinsic birefringence, and a polymer (B) of positive intrinsic birefringence. The polymer (A) is a polymer including a (meth) acrylic ester monomer unit (a), a vinyl cyanide monomer unit (b) and an aromatic vinyl monomer unit (c), and thermal decomposition temperatures of both the polymers (A) and (B) by dynamic TG method are 320°C or more. |
