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Structural evolution of PVDF during storage or annealing

Neidhöfer, M. and Beaume, F. and Ibos, L. and Bernès, Alain and Lacabanne, Colette Structural evolution of PVDF during storage or annealing. (2004) Polymer, vol. 4 (n° 5). pp. 1679-1688.

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Official URL: http://dx.doi.org/10.1016/j.polymer.2003.12.066

Abstract

The effect of annealing PVDF at temperatures above Tg and below Tm was investigated by differential scanning calorimetry (DSC), thermostimulated current spectroscopy (TSC) and solid-state NMR. This study evidences a progressive structural evolution, taking place during such annealing. Its characteristics (kinetics and its temperature dependence, lack of reversibility at lower temperature over extended periods of time, double organization corresponding to double annealing with unmodified kinetics) point to a mechanism of secondary crystallization as described by Marand et al. In addition to the formation of extra crystalline (hence rigid) material, this phenomenon is believed to generate increasing conformational constraints in the residual amorphous material. Accordingly, a progressive reduction of the molecular mobility was demonstrated by NMR during annealing.

Item Type:Article
Additional Information:The original publication is available on http://www.sciencedirect.com/science/journal/00323861
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Arkema (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Université Paris 12 Val de Marne (FRANCE)
Laboratory name:
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Deposited By: Thomas Bonnecarere

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