Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 69: Issue 3
The mechanism of α-γ transition of poly- (vinylidene fluoride) in the miscible blends
Authors:
G. Zhang Tokyo Metropolitan University Department of Applied Chemistry, Graduate School of Engineering Hachiouji, Tokyo 192-0397 Japan Hachiouji, Tokyo 192-0397 Japan

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T. Kitamura Tokyo Metropolitan University Department of Applied Chemistry, Graduate School of Engineering Hachiouji, Tokyo 192-0397 Japan Hachiouji, Tokyo 192-0397 Japan

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H. Yoshida Geomatec Co., Ltd 3-13-7, Yaguchi Ota-ku, Tokyo 146-0093 Japan 3-13-7, Yaguchi Ota-ku, Tokyo 146-0093 Japan

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T. Kawai Tokyo Metropolitan University Department of Applied Chemistry, Graduate School of Engineering Hachiouji, Tokyo 192-0397 Japan Hachiouji, Tokyo 192-0397 Japan

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Pages:
939–946
Online Publication Date:
02 Nov 2004
Publication Date:
01 Jul 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1020628627460
Keywords:
α-form; interaction parameter; blend; γ-form; PVDF; solid state transition; DSC-FTIR
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Abstract  

The simultaneous DSC-FTIR was used for the observation of crystallization and melting of poly(vinylidene fluoride) (PVDF) and its blends with poly(methyl methacrylate) (PMMA) and poly(ethyl methacrylate) (PEMA). The isothermal crystallization was carried out under the condition of both α-form and γ-form crystallized competitively. The crystal growth rate of α -form and γ -form were evaluated from the absorbance changes at 795 cm-1 (α -form, CH2 rocking) and 810 cm-1 (γ -form, CH2 rocking) obtained by the DSC-FTIR. The crystal growth rate of γ -form decreased at the same crystallization temperature in the order of PVDF/syn-PMMA, PVDF/PEMA and PVDF/at-PMMA, which was corresponding to the order of interaction parameter. The mechanism of α -g transition of PVDF in the miscible blends with at-PMMA, syn-PMMA and PEMA was evaluated from the relationship between the decrease of α -form and the increase of γ -form. The critical crystallization temperature, at which the transformation from α -form to γ -form proceeded only in the solid state, shifted to higher temperature side in the order of interaction parameter.

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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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