Electric properties, PVDF electronic

Electric properties are an essential asset of fluoropolymers, in particular for PVDF. With the recent technological boom of touchpad, this polymer found additional applications in electronic haptic technology. 

In order to anticipate problems and to interpret observations under the extreme conditions of shock compression, it is necessary to consider structural and electronic characteristics of PVDF. Although the phenomenological piezoelectric properties of PVDF are similar to those of the piezoelectric crystals, the structure of the materials is far more complex due to its ferroelectric nature and a heterogeneous mixture of crystalline and amorphous phases which are strongly dependent on mechanical and electrical history. 

Ferroelectric composites are alternatives to standard piezoelectric and pyroelectric ceramics such as lead zirconate titanate (PZT) and BaHOs (BT). They combine the strong ferroelectric and dielectric properties of ceramics with the easy processing and good mechanical properties of polymers. Dispersion of micrometer-sized ferroelectric particles in an electrically passive epoxy matrix was first published by Furukawa et al. [1976] and later extended to ferroelectric matrices such as poly(vinylidene fluoride) (PVDF) and poly(vinylidene fluoride-co-3-fluoroethylene) (PVDF-TrFE) [Hsiang et al., 2001 Hilczer et al., 2002 Gimenes et al., 2004 Lam et al., 2005 Beloti et al., 2006]. However, the necessity of miniaturization of electronic components and... 

For the first five years of its life, KYNAR pvdf was used primarily in the electrical and electronic markets. The product proved to have just the right combination of properties for insulation of computer wiring, and jacketing on cable constructions used in the military and aerospace applica-tions-... 

These properties are widely used in many applications due to its high permittivity and its low dielectric losses, PVDF is widely used for the insulation of electric and electronic devices. For example, it can be used as insulating layer in condensers. It is also useful as thin film electret in transducer technology. Its ferroelectric properties are used in microphones, loudspeakers, and so on. 

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