Evaluation of physical properties of the polymer composition

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A method evaluates the mobility of a polymer composition in a high-temperature region of 150° C. or above. The method for evaluating a physical property of a polymer composition, the method comprising the steps of : obtaining a thin film sample which is formed on a substrate and which comprises : a fluorescent probe including a fluorescent rare earth complex having a melting point of 200° C. or higher; and a target polymer composition; and obtaining a relationship between a temperature and a fluorescent characteristic of the thin film.