Chemiluminescence study on HALS antioxidant activity in LDPE |
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Authors: | Silviu Jipa Traian Zaharescu Radu Setnescu Laura Monica Gorghiu Crinela Dumitrescu Călin Oros |
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Affiliation: | (1) Faculty of Science, University VALACHIA Targoviste, 2 Carol Av, 0200, Romania;(2) Advanced Research Institute for Electrical Engineering, 313 Splaiul Unirii, Bucharest, 030138, Romania |
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Abstract: | Summary The kinetic study on thermal degradation of stabilised low density polyethylene by chemiluminescence investigations was performed. Four hindered amine light stabilisers, additive compounds, were used as thermal protector on polymer substrate. The experiments were carried out on the samples consisting of polyetylene and 0.25% (w/w) of hindered amine. Three temperatures (180, 190 and 200 °C) were selected for this assay allowing the calculation of the activation energy required for thermal oxidation of polyethylene matrix. A discussion on mechanistic aspects concerning the antioxidant efficiency of studied compounds is also presented. |
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