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

Varga, József and Kállay-Menyhárd, Alfréd (2003) Crystallization, melting and structure of polypropylene/poly(vinylidene-fluoride) blends. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 73 (3). pp. 735-743. ISSN 1388-6150

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Blends were prepared from isotactic polypropylene (iPP) along with its beta-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 alpha-nucleating effect on iPP. The crystallization of iPP starts on the surface of dispersed PVDF droplets and an alpha-transcrystalline layer forms on the surface of the crystalline PVDF phase. The iPP matrix crystallizes predominantly in alpha-form in spite of the presence of a highly active beta-nucleating agent.

Item Type: Article
Uncontrolled Keywords: calorimetry, crystallization, a-iPP, b-iPP, isotactic polypropylene, melting, a-nucleating agent, b-nucleating agent, polarized light microscopy, polymer blends, poly(vinylidene-fluoride), transcrystallinity
Subjects: Q Science / természettudomány > QC Physics / fizika
Q Science / természettudomány > QD Chemistry / kémia
Depositing User: MTMT SWORD
Date Deposited: 26 Feb 2014 17:31
Last Modified: 26 Feb 2014 17:31

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