Abstract
Copolymer films, with various concentrations of styrene (ST) and methyl-methacrylate (MMA), were prepared by thermal polymerization. The films were exposed to different doses of gamma rays up to 10 Mrad. The optical absorption α and the optical parameters, including the energy band gap E g and band tail width E w , were estimated for the films before and after irradiation by gamma rays. Furthermore, the effect of UV radiation on un-irradiated films was investigated. The specular reflection of PS, PMMA, and copolymer has been measured. The refractive index and Cauchy's constants were evaluated for the films before and after irradiation by gamma rays. The structure–property behavior of the films was scrutinized by DSC and FT-IR.
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