Skip to main content

Relationship between processing conditions, defects and thermal degradation of poly(vinylidene fluoride) in the β-phase

Journal Article


Abstract


  • Poly(vinylidene fluoride), PVDF, in its β-phase is an electroactive polymer with many technological applications. There are two main ways to prepare this polymer in its electroactive β-phase: by high temperature stretching from the α-phase and directly from solution. In this paper, the influence of the processing methods in the thermal stability of the samples was studied by UV-VIS spectroscopy and thermogravimetric analysis. The number of chain defects was measured by 1H NMR. The results obtained were compared to a commercial β-PVDF sample. The number of head to head defects in the different samples is found to be between 6% and 9%. The onset temperature for thermal degradation and the average activation energy (∼76.5 kJ mol-1) of the process are approximately equal for the α-phase sample and the β-phase obtained from it. Larger values of the onset temperature and average activation energy (∼100 kJ mol-1) are found for the β-phase sample directly obtained from the solution and for the commercial β-phase sample. The thermal degradation of the samples occurs in two steps, independently of the phase of the sample, the degree of crystallinity and the processing method. © 2007 Elsevier B.V. All rights reserved.

UOW Authors


  •   Botelho, Gabriela (external author)
  •   Lanceros-Méndez, Senentxu (external author)
  •   Gonçalves, A M. (external author)
  •   Gomes da Silva Sencadas, Vitor
  •   Rocha, José Gerardo (external author)

Publication Date


  • 2008

Citation


  • Botelho, G., Lanceros-Méndez, S., Gonçalves, A. M., Sencadas, V. & Rocha, J. G. (2008). Relationship between processing conditions, defects and thermal degradation of poly(vinylidene fluoride) in the β-phase. Journal of Non-Crystalline Solids, 354 (1), 72-78.

Scopus Eid


  • 2-s2.0-36549017205

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3750

Number Of Pages


  • 6

Start Page


  • 72

End Page


  • 78

Volume


  • 354

Issue


  • 1

Abstract


  • Poly(vinylidene fluoride), PVDF, in its β-phase is an electroactive polymer with many technological applications. There are two main ways to prepare this polymer in its electroactive β-phase: by high temperature stretching from the α-phase and directly from solution. In this paper, the influence of the processing methods in the thermal stability of the samples was studied by UV-VIS spectroscopy and thermogravimetric analysis. The number of chain defects was measured by 1H NMR. The results obtained were compared to a commercial β-PVDF sample. The number of head to head defects in the different samples is found to be between 6% and 9%. The onset temperature for thermal degradation and the average activation energy (∼76.5 kJ mol-1) of the process are approximately equal for the α-phase sample and the β-phase obtained from it. Larger values of the onset temperature and average activation energy (∼100 kJ mol-1) are found for the β-phase sample directly obtained from the solution and for the commercial β-phase sample. The thermal degradation of the samples occurs in two steps, independently of the phase of the sample, the degree of crystallinity and the processing method. © 2007 Elsevier B.V. All rights reserved.

UOW Authors


  •   Botelho, Gabriela (external author)
  •   Lanceros-Méndez, Senentxu (external author)
  •   Gonçalves, A M. (external author)
  •   Gomes da Silva Sencadas, Vitor
  •   Rocha, José Gerardo (external author)

Publication Date


  • 2008

Citation


  • Botelho, G., Lanceros-Méndez, S., Gonçalves, A. M., Sencadas, V. & Rocha, J. G. (2008). Relationship between processing conditions, defects and thermal degradation of poly(vinylidene fluoride) in the β-phase. Journal of Non-Crystalline Solids, 354 (1), 72-78.

Scopus Eid


  • 2-s2.0-36549017205

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3750

Number Of Pages


  • 6

Start Page


  • 72

End Page


  • 78

Volume


  • 354

Issue


  • 1