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Crystallization, melting and structure of polypropylene/poly(vinylidene-fluoride) blends

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Abstract

Blends were prepared from isotactic polypropylene (iPP) along with its b-nucleated form and poly(vinylidene-fluoride) (PVDF). Melting, and crystallization characteristics as well as structure of the blends were studied by polarized light microscopy (PLM) and differential scanning calorimetry. According to PLM studies, the phase structure of these blends is heterogeneous in the molten state. The temperature range of crystallization of PVDF during cooling is higher than that of iPP. PVDF has a strong α-nucleating effect on iPP. The crystallization of iPP starts on the surface of dispersed PVDF droplets and an α-transcrystalline layer forms on the surface of the crystalline PVDF phase. The iPP matrix crystallizes predominantly in a-form in spite of the presence of a highly active b-nucleating agent.

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Authors and Affiliations

  1. Department of Plastics and Rubber Technology, Budapest University of Technology and Economics, 1521, Budapest, P.O. Box 92, Hungary

    J. Varga & A. Menyhárd

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  1. J. Varga
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  2. A. Menyhárd
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Varga, J., Menyhárd, A. Crystallization, melting and structure of polypropylene/poly(vinylidene-fluoride) blends. Journal of Thermal Analysis and Calorimetry 73, 735–743 (2003). https://doi.org/10.1023/A:1025870111612

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  • DOI: https://doi.org/10.1023/A:1025870111612

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