The initiated photodegradation of polystyrene films notice able all around were examined (for 400 hrs.) in the being and absence of Schiff bases for benzoxazin product compounds by quickened weathering analyzer. The adding of (0.1% wt/v) of organic compounds to polystyrene films (thickness, 25µm) diminished the degradation of the polystyrene. The rate of degradation was trailed by an expansion in absorbtion of carbonyl for polymers utilizing viscosity, I.R., and UV spectra estimation. As per the results, the initiated degradation instruments of polystyrene films were recommended under the exploratory term utilized utilizing temperature 45 oC, radiation of UV at λ = 313 nm , illumination force 3.49x10-5 einsteins.dm-3.S-1.