✦ LIBER ✦

Effect of NaCl filler on ferroelectric phase and polaron configurations of PVDF films

✍ Scribed by I. S. Elashmawi

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 166 KB
Volume: 42
Category: Article
ISSN: 0232-1300
DOI: 10.1002/crat.200610833

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✦ Synopsis

Abstract

Polyvinyldene fluoride (PVDF) films filled with NaCl of mass fraction range 1 ≤ W ≤ 6 % were prepared by casting technique. Their crystalline structure, thermal, optical properties and Electron spin resonance (ESR) were examined. X‐ray diffraction (XRD) and differential thermal analysis (DTA) measurements indicated a maximum ferroelectric β‐phase increment at 4%. DTA was used to identify the phase transition temperatures, the order of reaction and the activation energy of melting. The UV‐Visible optical absorption implied a minimum value of the estimated optical energy gap at W = 4%. ESR spectra contained a Lorentizian signal exhibiting a minimum value of the symmetry factor at W = 4%. The energy levels of the optical gap boundaries were though to contribute to ESR transitions. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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