Photo-oxidation behaviour of polyethylene/multi-wall carbon nanotube composite films |
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Authors: | N. Tz. Dintcheva F.P. La Mantia |
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Affiliation: | a Dipartimento di Ingegneria Chimica dei Processi e dei Materiali, Università di Palermo, Viale delle Scienze, ed. 6, 90128 Palermo, Italy b Materials Science Department, Università Milano Bicocca, Via R. Cozzi 53, 20125 Milano, Italy |
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Abstract: | The resistance to accelerated photo-oxidation of polyethylene/multi-walled carbon nanotubes (MW-CNTs) composite films was compared with the photo-oxidation behaviour of pristine polyethylene film. The polyethylene/MW-CNTs films containing different CNTs loading were subjected to accelerated UV-B exposure. At short exposure time, i.e. under 200 h, the rates of carbonyl formation are very similar to that observed for pristine polyethylene film but at longer irradiation times the carbonyl formation increases for lower MW-CNTs contents (0.1, 0.2 and 0.5% wt./wt.), and decreases for higher MW-CNTs contents (1 and 2% wt./wt.). By adding a UV-stabilizer to the films their photo-oxidation rates are drastically decreased also at low MW-CNTs concentration. Addition of a metal deactivator (MD) produced no observable effect. |
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Keywords: | Photo-oxidation Carbonyl index Carbon nanotubes Packaging Polyethylene UV-stabilizer |
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