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α to β Phase Transformation and Microestructural Changes of PVDF Films Induced by Uniaxial Stretch

Sencadas, V., Gregorio, R., Lanceros-Méndez, S.·2009·Journal of Macromolecular Science, Part B

Abstract

The phase transformation from α to β poly(vinylidene fluoride) (PVDF) through a stretching process at different temperatures was investigated. Samples of originally α-PVDF were stretched uniaxially at different temperatures at draw ratios from 1 to 5. The stretched samples were studied and characterized by infrared spectroscopy, scanning electron microscopy, and differential scanning calorimetry. The maximum β-phase content was achieved at 80°C and a stretch ratio of 5, but the samples still showed 20% of the original α-phase. Accompanying the phase transformation, an orientation of the polymer chains was observed. The stretching process also influenced the degree of crystallinity of the polymer. Poling of the samples also improves the α- to β-phase transformation.

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Metadata

Authors
Sencadas, V., Gregorio, R., & Lanceros-Méndez, S.
Venue
Journal of Macromolecular Science, Part B
Published
2009-05-08
Volume
48
Issue
3
Pages
514-525
ISSN
  • 0022-2348 (ISSN-L)
  • 1525-609X
OpenAlex
W2010916348
Cited by
607
References
13
FWCI
10.87
Type
journal article
Language
en
Open access
closed

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Sencadas, V., Gregorio, R., & Lanceros-Méndez, S. (2009). α to β Phase Transformation and Microestructural Changes of PVDF Films Induced by Uniaxial Stretch. Journal of Macromolecular Science, Part B. https://doi.org/10.1080/00222340902837527

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