Morphological and Dielectric Properties of Barium Chloride-Filled Poly(vinylidene fluoride) Films

Özkazanç E., Güney H. Y., Güner S., Abacı U.

POLYMER COMPOSITES, cilt.31, sa.10, ss.1782-1789, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 31 Sayı: 10
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1002/pc.20970
  • Dergi Adı: POLYMER COMPOSITES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1782-1789
  • Kocaeli Üniversitesi Adresli: Evet

Özet

Morphological characteristics of poly(vinylidene fluoride) (PVDF) films, filled with mass fractions (w <= 20%) of Barium Chloride (BaCl(2)), were investigated by X-ray diffraction (XRD), Fourier transform infrared (FTIR) absorption spectra and differential scanning calorimetry (DSC) measurements. The dielectric properties of films were measured from 250 Hz to 1 MHz range between 100 and 400 K as a function of frequency and temperature. Spectroscopic data revealed that the filled and unfilled films include alpha-, beta-, and gamma-crystalline phases. By a 20% filling, 73% increase was obtained in the total degree of crystallinity. Since the BaCl2 formed fluorine bridges over the chain segments on the crystal lamellar surface, the gamma-crystalline phase decreased, whereas the total degree of crystallinity increased. Dielectric measurements showed that maximum of the dielectric loss factor belonging to beta-relaxation transition decreased linearly with filling level. The filling process did not have any effect on the real dielectric constant till alpha-relaxation transition region. However, in the alpha-relaxation transition region, it was determined that the real dielectric constant increased linearly with filling level. POLYM. COMPOS., 31:1782-1789, 2010. (C) 2010 Society of Plastics Engineers