High beta-phase processing of polyvinylidenefluoride for pyroelectric applications


Tansel T.

JOURNAL OF POLYMER RESEARCH, vol.27, no.4, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 4
  • Publication Date: 2020
  • Doi Number: 10.1007/s10965-020-02073-w
  • Title of Journal : JOURNAL OF POLYMER RESEARCH

Abstract

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.