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The effect of photo-oxidation on thermal and fire retardancy of polypropylene nanocomposites

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Abstract

Nanocomposites of polypropylene-graft-maleic anhydride/clay were prepared by melt blending in an extruder mixer. The nanoscale dispersion of the clay in the polymer was analysed by wide-angle X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results of XRD and TEM showed that the nanocomposites obtained were a kind of intercalated-delaminated structures side by side with different dominant states, depending on the clay used and on the processing conditions. The consequences of photo-oxidation on the thermal stability and fire retardant properties of the nanocomposites were investigated using thermogravimetric analysis and cone calorimetry tests. It appeared that this degradation dramatically affected the important properties of the nanocomposites. A loss of thermal stability and fire retardant performance was observed. This was ascribed to scission reactions that occurred during the oxidative degradation prior to thermal and fire tests.

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Acknowledgements

The authors are indebted to the Volkswagen foundation for the financial support, the Federal Institute for Research and Testing (BAM) for the cone tests, Mr. Claude da Silva from the Université de Mulhouse, France, for the X-ray measurements and, Dr. Bénédicte Mailhot from the Laboratoire de Photochimie de l’Université BP de Clermont, France, for the oxidation profile.

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Authors and Affiliations

  1. LRNA, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, BP 5005, Dakar-Fann, Sénégal

    Magatte Diagne, Mamadou Gueye, Anicet Dasilva & Adams Tidjani

  2. Service de Microscopie Electronique, Institut de chimie des surfaces et interfaces CNRS UPR 9069, 15 Rue Jean Starky, BP 2488F-68057, Mulhouse, France

    Loic Vidal

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  1. Magatte Diagne
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  2. Mamadou Gueye
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  3. Anicet Dasilva
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  4. Loic Vidal
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  5. Adams Tidjani
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Correspondence to Magatte Diagne.

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Diagne, M., Gueye, M., Dasilva, A. et al. The effect of photo-oxidation on thermal and fire retardancy of polypropylene nanocomposites. J Mater Sci 41, 7005–7010 (2006). https://doi.org/10.1007/s10853-006-0221-6

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  • DOI: https://doi.org/10.1007/s10853-006-0221-6

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