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Molecular orientation and degree of crystallinity of piezoelectric poly(vinylidene fluoride) films exclusively in the β phase

Journal Article


Abstract


  • Oriented -phase films were obtained by drawing exclusively -phase films obtained from dimethylformamide solution crystallization at 60 C with subsequent pressing. Wide angle X-ray diffraction and pole figure plots showed that drawing at 90C and with R = 4 of originally -phase films results in exclusively -phase films with crystallinity degree of 49% and orientation factor of 0.885. For comparison, with the conventional drawing technique from -phase material, films oriented at a ratio (R) of 5 still contain about 20% of phase , a crystallinity degree of 40% and -phase crystallographic c-axis orientation factor of 0.655.

UOW Authors


  •   Gomes da Silva Sencadas, Vitor
  •   Branciforti, Márcia Cristina (external author)
  •   Grégório, Rinaldo (external author)
  •   Lanceros-Méndez, Senentxu (external author)

Publication Date


  • 2008

Citation


  • Sencadas, V., Branciforti, M. C., Grégório, R. & Lanceros-Méndez, S. (2008). Molecular orientation and degree of crystallinity of piezoelectric poly(vinylidene fluoride) films exclusively in the β phase. Ferroelectrics, 370 (1 PART 4), 29-35.

Scopus Eid


  • 2-s2.0-75449104646

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3744

Number Of Pages


  • 6

Start Page


  • 29

End Page


  • 35

Volume


  • 370

Issue


  • 1 PART 4

Abstract


  • Oriented -phase films were obtained by drawing exclusively -phase films obtained from dimethylformamide solution crystallization at 60 C with subsequent pressing. Wide angle X-ray diffraction and pole figure plots showed that drawing at 90C and with R = 4 of originally -phase films results in exclusively -phase films with crystallinity degree of 49% and orientation factor of 0.885. For comparison, with the conventional drawing technique from -phase material, films oriented at a ratio (R) of 5 still contain about 20% of phase , a crystallinity degree of 40% and -phase crystallographic c-axis orientation factor of 0.655.

UOW Authors


  •   Gomes da Silva Sencadas, Vitor
  •   Branciforti, Márcia Cristina (external author)
  •   Grégório, Rinaldo (external author)
  •   Lanceros-Méndez, Senentxu (external author)

Publication Date


  • 2008

Citation


  • Sencadas, V., Branciforti, M. C., Grégório, R. & Lanceros-Méndez, S. (2008). Molecular orientation and degree of crystallinity of piezoelectric poly(vinylidene fluoride) films exclusively in the β phase. Ferroelectrics, 370 (1 PART 4), 29-35.

Scopus Eid


  • 2-s2.0-75449104646

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/3744

Number Of Pages


  • 6

Start Page


  • 29

End Page


  • 35

Volume


  • 370

Issue


  • 1 PART 4