Abstract
Analysis of the excimer fluorescence emission decay for a wide range of wavelengths is reported for crystalline isotactic polystyrene (iPS) and for atactic polystyrene (aPS) film. A two-exponential function was used to fit the fluorescence decays of crystalline iPS. The decay time (lifetime) of the main component (88%) was estimated to be 21 ns and was also observed as one of three decay parameters of aPS. It is suggested that the 21 ns lifetime parameter corresponds to an excimer structure associated with the amorphous lamellar border region of the crystalline material.
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