The photooxidation and photostabilisation of a polyphasic copolymer of propylene and ethylene containing a fire retardant system (decabromodiphenylether, antimony trioxide) have been investigated. Various samples, prepared by compounding and extrusion, have been irradiated in artificial accelerated weathering conditions (SEPAP 12.24 unit), in the form of 3 mm thick plates or 10 to 100 mu m thick films
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