PVDF, or PolyVinylidine DiFluoride, is a highly non-reactive and pure thermoplastic fluoropolymer. It is also known as KYNARŪ.
PVDF is very expensive; its use generally reserved for applications requiring the highest purity, strength, and resistance to solvents, acids, bases and heat. It is available as piping products, sheet and plate. It can be injection molded and welded and is commonly used in the chemical, semiconductor and medical industries.
PVDF is a ferroelectric polymer, exhibiting efficient piezoelectric and pyroelectric properties. These characteristics make it useful in sensor and battery applications.
Physical properties
| Property
| Metric
| English
|
| Melting point
| 134–169 °C
| 273–336 °F
|
| Density
| 1.78 g/cm3
| 111 lb/ft3
|
|
| Thermal conductivity
| 0.18 W m-1 K-1
|
|
| Coefficent of expansion
| 0.18×10-6 K-1
| 0.10×10-6 °F-1
|
|
| Yield strength
| 15–35 MPa
| 2.2–5.0 kpsi
|
| Elongation at rupture
| 200%–750%
|
|
| Modulus of elasticity
| 350–1100 MPa
| 50–160 kpsi
|
| Volume resistivity
| ≥ 1x1012 Ω·m
|
|
See also
External links
Description