عنوان مقاله [English]
نویسنده [English]چکیده [English]
The radiation stability of polypropylene produced in Bandar Emam Petrochemical Co. and stabilized with two phenolic antioxidants (Irganox 1010, Irganox 1076) and two hindered amine light stabilizers, HALS, (Tinuvin 622, Tinuvin 770) have been investigated. The effectiveness of the stabilizers at 0.2% concentration on the polypropylene samples irradiated at 25 kGy has been followed for 6 months after irradiation. The buildup of carbonyl group and trends of the change in bend strength and MFI for the stabilized samples with Irganox 1076 and Tinuvin 622 show the post-irradiation embrittlement of these samples. The negligible change in carbonyl group, bend strength and MFI for the samples stabilized with Irganox 1010 and Tinuvin 770 indicated the better effectiveness of these two stabilizers.