Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 73: Issue 3
Crystallization, melting and structure of polypropylene/poly(vinylidene-fluoride) blends
Authors:
J. Varga Budapest University of Technology and Economics Department of Plastics and Rubber Technology 1521 Budapest P.O. Box 92 Hungary 1521 Budapest P.O. Box 92 Hungary

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

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Pages:
735–743
Online Publication Date:
31 Oct 2004
Publication Date:
01 Sep 2003
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1025870111612
Keywords:
crystallization; melting; polymer blends; a-nucleating agent; b-iPP; b-nucleating agent; polarized light microscopy; calorimetry; isotactic polypropylene; a-iPP; poly(vinylidene-fluoride); transcrystallinity
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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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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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