Effect of zinc borate on the thermal degradation of ammonium polyphosphate |
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Authors: | F. Samyn S. Duquesne R. Delobel |
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Affiliation: | Laboratoire Procédés d’Elaboration des Revêtements Fonctionnels (PERF), LSPES - UMR 8008, Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Avenue Dimitri Mendeleïev - Bât. C7, BP 90108, 59652 Villeneuve d’Ascq Cedex, France |
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Abstract: | The thermal behaviour of a mixture containing an ammonium polyphosphate based compound (AP760) and zinc borate (ZB) is investigated. After an investigation of the degradation of the pure components, the interactions between them are examined by thermogravimetry. Then, X-ray diffraction (XRD) and 11B and 31P solid-state nuclear magnetic resonance (NMR) measurements have been carried out on residues of mixtures of AP760 and FBZB heat treated at different characteristic temperatures. It reveals the nature of the interactions taking place between the two components. It is demonstrated that reactions lead to the formation of zinc phosphate and of borophosphates. Mechanisms of thermal degradation are proposed. |
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Keywords: | Zinc borate Ammonium polyphosphate Zinc borate 11B-31P solid state NMR Thermal degradation X-ray diffraction |
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