Comment on 'Preparation and Characterization of Silver-Poly(vinyIidene fluoride) Nanocomposites: Formation of Piezoelectric Polymorph of Poly(vinylidene fluoride)'

摘要

Poly(vinylidene fluoride) (PVDF) is a versatile polymer due to its chemical resistive properties and five different crystalline polymorphs (α,β,γ,δ and ε). The β crystalline phase is the main focus of interest due to its effective dipole moment. In the commented article, the main emphasis is on the formation of the piezoelectric active β phase in silver-PVDF nanocomposite. From the available results (Figure 6 and 7 in the commented article), it is easy to understand that there is no existence of the β phase formation, rather it is mainly dominated by the γ phase in the silver-PVDF nanocomposite. The FT-IR results (Figure 7 in the commented article) do not show the main characteristic peak of the β phase around 1279 cm~(-1) (see the concerning Table 2 in the commented article) whereas the main characteristic peak of the y phase around 1234 cm~(-1) is clearly visible (not listed in Table 2 in the commented article). Moreover, samples PNC 11 and PNC 0.5 contain six and five peaks, respectively, regardless of the consistency of their position and intensity, within the spectral region between 1260 and 1100 cm~(-1) (Figure 7 in the commented article).