C A O ROCHA
Articles written in Bulletin of Materials Science
Volume 42 Issue 5 October 2019 Article ID 0201
n this work, the possibility of improving the microstructural and dielectric properties of poly(vinylidene ﬂuoride)(PVDF) by the addition of potassium dihydrogen phosphate (KDP) to the polymer matrix is speculated. Both PVDF and KDP are ferroelectric and piezoelectric materials, so the combination may result in a synergistic interaction. PVDF and KDP were dissolved in water/dimethylformamide at 70#176&;C. The solutions were deposited by casting to obtain ﬁlms. The samples were characterized by energy-dispersive X-ray spectroscopy, scanning electron microscopy, X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. XRD tests of the samples showed that hydrated PVDF ﬁlms resume crystallinity up to a maximum content of 3.0% by weight of KDP. FTIR conﬁrmed the possibility of adjusting the intensity of the alpha (α)-and beta (β)-phase peaks in the polymer through water and KDP contents. Finally, the dielectric constant and the dielectric loss factor of the new materials at room temperature were determined.
Volume 43, 2020
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