Structure and morphology of an intumescent polypropylene blend

Authors

  • X. Almeras,

    1. Laboratoire des Procédés d'Élaboration des Revêtements Fonctionnels (PERF) UPRES EA 1040, ENSC-Lille, BP 108, 59652 Villeneuve d'Ascq Cedex, France
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  • N. Renaut,

    1. Laboratoire des Procédés d'Élaboration des Revêtements Fonctionnels (PERF) UPRES EA 1040, ENSC-Lille, BP 108, 59652 Villeneuve d'Ascq Cedex, France
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  • C. Jama,

    1. Laboratoire des Procédés d'Élaboration des Revêtements Fonctionnels (PERF) UPRES EA 1040, ENSC-Lille, BP 108, 59652 Villeneuve d'Ascq Cedex, France
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  • M. Le Bras,

    Corresponding author
    1. Laboratoire des Procédés d'Élaboration des Revêtements Fonctionnels (PERF) UPRES EA 1040, ENSC-Lille, BP 108, 59652 Villeneuve d'Ascq Cedex, France
    • Laboratoire des Procédés d'Élaboration des Revêtements Fonctionnels (PERF) UPRES EA 1040, ENSC-Lille, BP 108, 59652 Villeneuve d'Ascq Cedex, France
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  • A. Tóth,

    1. Research Laboratory of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Budapest, Hungary
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  • S. Bourbigot,

    1. Laboratoire des Procédés d'Élaboration des Revêtements Fonctionnels (PERF) UPRES EA 1040, ENSC-Lille, BP 108, 59652 Villeneuve d'Ascq Cedex, France
    2. École Nationale Supérieure des Arts et Industries Textiles (ENSAIT), Laboratoire GEMTEX, 9 rue de l'Ermitage, BP 30329, Roubaix Cedex 01, Roubaix, France
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  • Gy. Marosi,

    1. Organic Chemistry Technology Department, Budapest University of Technology and Economics (BUTE), H-1111 Müegyetem rkp. 3, Budapest, Hungary
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  • F. Poutch

    1. Centre de Recherche et d'Etudes sur les Procédés d'Ignifugation des Matériaux (CREPIM), Rue Christophe Colomb, 62700, Bruay La Buissière, France
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Abstract

This article deals with the study of the efficiency of different compatibilizing agents in the intumescent polypropylene/polyamide-6/ammonium polyphosphate (PP/PA-6/APP) blend. The migration of additive was first investigated by X-ray photoelectron spectroscopy. The study showed that ethylene–butyl acrylate–maleic anhydride is not efficient in preventing the exudation of APP to the surface. However, ethylene vinyl acetate (EVA) prevented such a phenomenon. Second, the modifications in the blends were analyzed as a function of their compositions. Optical microscopy analysis showed that adding EVA to PP/PA-6/APP promoted a decrease in the size of PA-6 droplets. X-ray diffraction was used to characterize the effect of each component on the PP crystallinity. It was clearly shown that the crystallinity depends on the composition of the blend. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 402–411, 2004

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