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Photooxidation of polypropylene/layered double hydroxide nanocomposites: Influence of intralamellar cations |
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| Authors: | Sunil P Lonkar Sandrine Therias Nathalie Caperaa Fabrice Leroux Jean-Luc Gardette |
| Institution: | a Clermont Université, Université Blaise Pascal, Laboratoire de Photochimie Moléculaire et Macromoléculaire, BP 10448, F-63000 Clermont-Ferrand, France b CNRS, UMR 6505, LPMM, F-63173 Aubière, France c Clermont Université, Université Blaise Pascal, Laboratoire des Matériaux Inorganiques, BP 10448, F-63000 Clermont-Ferrand, France d CNRS, UMR 6002, LMI, F-63173 Aubière, France |
| Abstract: | The influence of layered double hydroxides (LDHs) on the photooxidation of polypropylene (PP)/LDH nanocomposites was studied under irradiation at long wavelengths (λ > 300 nm, 60 °C and in the presence of oxygen). The influence of hybrid LDHs containing different divalent cations (Mg, Zn or both Mg and Zn) on the photooxidation mechanism of PP and on the rates of oxidation of the matrix was characterised based on infrared analysis. The presence of LDHs modifies the photoproducts accumulating in the PP and the rates of oxidation of PP were changed depending on the divalent cations in the LDH layers. Whereas natural clays, such as montmorillonite (MMt), can lead to a faster degradation of the materials, LDHs (Zn2-Al-DS, for example) appear to have no inductive effect on polymer oxidation. |
| Keywords: | Polypropylene LDH Nanocomposite Photooxidation Durability |
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