High beta-phase processing of polyvinylidenefluoride for pyroelectric applications


Tansel T.

JOURNAL OF POLYMER RESEARCH, cilt.27, sa.4, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 27 Konu: 4
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s10965-020-02073-w
  • Dergi Adı: JOURNAL OF POLYMER RESEARCH

Özet

It is well known that poly(vinylidene fluoride) (PVDF) crystallizes in semi polymorphic crystalline forms of alpha, beta, gamma,-phases. The piezo- as well as pyroelectric properties of PVDF is strongly dependent on its beta-crystalline phase. These features make it suitable for sensors and battery applications. Thin films of PVDF are widely used in recent thermal camera sensors. In this study, optimum beta-crystalline phase of PVDF thin film can be produced easily via a single-step process by crystallization from gel states in the presence of corona fields. FTIR- spectroscopy investigations indicate high volume fraction of beta-phases for such films. The measured pyroelectric coefficient of 33 +/- 2 C/m(2)K exhibits a comparable result with those reported from conventionally obtained beta- phase PVDF foils which requires complex treatments.