Polymorphism in a metallocenic isotactic polypropylene as revealed by means of FTIR spectroscopy: Influence of the processing conditions

Authors

  • V. Lorenzo,

    Corresponding author
    1. POLímeros: Caracterización y Aplicaciones (POLCA – UA del ICTP-CSIC), Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, 28006, Madrid, Spain
    • POLímeros: Caracterización y Aplicaciones (POLCA – UA del ICTP-CSIC), Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, 28006, Madrid, Spain
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  • M.J. Polo-Corpa,

    1. Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
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  • E. Pérez,

    1. Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
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  • R. Benavente,

    1. Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva 3, 28006, Madrid, Spain
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  • M.U. de la Orden,

    1. Depto. de Química Orgánica I, Escuela Universitaria de Óptica, Universidad Complutense de Madrid, Arcos de Jalón s/n, 28037, Madrid, Spain
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  • J. Martínez-Urreaga

    1. POLímeros: Caracterización y Aplicaciones (POLCA – UA del ICTP-CSIC), Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, 28006, Madrid, Spain
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Abstract

The polymorphic structure in specimens of a metallocenic isotactic polypropylene, processed under different conditions, has been studied by means of wide-angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), and Fourier transform infrared spectroscopy (FTIR). The proportions of the different polymorphs have been evaluated, and the influence of the processing parameters (nucleating agents, cooling rate, and nature of the surface of the molds) has been analyzed. The combination of WAXS, DSC, and FTIR results confirms the adequacy of this last technique to obtain quantitative information about the competition between the crystalline phases of polypropylene. It has also been proved that the nature of the mold can enhance considerably the activity of beta-nucleating agents. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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