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Influence of the CaCO3 nanoparticles on the molecular orientation of the polypropylene matrix

Authors

  • D. García-López,

    1. Dpt. Física de la Materia Condensada, ETSII, Universidad de Valladolid, Po. del Cauce s/n, 47011 Valladolid, Spain
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  • J. C. Merino,

    1. Dpt. Física de la Materia Condensada, ETSII, Universidad de Valladolid, Po. del Cauce s/n, 47011 Valladolid, Spain
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  • J. M. Pastor

    Corresponding author
    1. Dpt. Física de la Materia Condensada, ETSII, Universidad de Valladolid, Po. del Cauce s/n, 47011 Valladolid, Spain
    • Dpt. Física de la Materia Condensada, ETSII, Universidad de Valladolid, Po. del Cauce s/n, 47011 Valladolid, Spain
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Abstract

The presence of aggregates of CaCO3 nanoparticles in an isotactic polypropylene matrix processed by extrusion promotes the apparition of residual stresses. These stresses are removed with a thermal treatment of the composite, but a higher molecular orientation is then produced. The chain orientation inside the sample is nonhomogeneous due to the presence of the aggregates of nanoparticles. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 947–952, 2003

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