Acryloyl chloride (AC) was grafted into commercial polyethylene films (PE) by g-irradiation, in order to obtain precursor grafted polymers. Disperse orange-3, disperse orange-13, disperse yellow-7 and disperse red-13 were incorporated to these polymers by esterification. The obtained azo-polymers films were characterized by FTIR spectroscopy and their thermal and optical properties were studied by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and absorption spectroscopy. These polymers exhibited a good thermal stability with T₁₀ values between 460-500^oC. The melting point of the polymers was very similar to that of the non-grafted PE. Obtained azopolymers exhibited a maximum absorption wavelength in the range 381-501 nm depending on the incorporated azo-dye. The surface of the azo-polymer films was studied by atomic force microscopy (AFM) and the particle size was determined.

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