| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for treating a polystyrene based resin in a low cost due to a large scale and a sufficient efficiency, which is difficult to be separated so as to be recycled due to contamination by a foreign substance, dye or the like, and contamination by a foreign resin, and due to an ununiformity of the grade or the like, and which tends to be comparatively degraded by ultraviolet ray and heat or the like. SOLUTION: The modification method of a styrene based resin is characterized by introducing an ion group into a resin which includes a styrene group along with irradiation of an ultraviolet ray.
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