Effect of Metal Acetylacetonates on the Photooxidative Destruction of High Density Polyethylene

AUTOR(ES)

Kiryakova, Dimitrina, Mihaleva, Stiliyana, Atanassov, Atanas

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

14/07/2016

RESUMO

The process of photooxidative destruction of high density polyethylene films containing different organic complexes of polyvalent metals as pro-oxidant additives after UV- irradiation was studied. During exposure to UV- irradiation, the more significant changes in the mechanical and thermal properties were detected for the foils containing pro-oxidant additives compared to initial high density polyethylene. This indicated for the higher degree of oxidation in these samples and confirmed the effectiveness of thеsе additives in promoting the oxidation of high density polyethylene during UV-irradiation. It was found that the decrease of the strength of the initial high density polyethylene foils was more pronounced for the samples with pro-oxidants cobalt (III) acetylacetonate and manganese (II) acetylacetonate. The use of 2 mmol/kg iron (III) acetylacetonate and 4 mmol/kg cobalt (III) acetylacetonate as pro-oxidants gave the highest decrease of elongation at break of the polyethylene foils.

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