# Polyvinylidene Fluoride (PVDF)

PVDF is a thermoplastic, further classified as a polyvinyl plastic. It has a fairly high density and a moderately high ductility among thermoplastics. The graph bars on the material properties cards below compare PVDF to: polyvinyl plastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

## Mechanical Properties

Elastic (Young's, Tensile) Modulus

1.1 *GPa* 0.16 *x 10 ^{6} psi*

Elongation at Break

200 *%*

Flexural Modulus

1.5 *GPa* 0.22 *x 10 ^{6} psi*

Flexural Strength

75 *MPa* 11 *x 10 ^{3} psi*

Impact Strength: Notched Izod

180 *J/m* 3.3 *ft-lb/in*

Rockwell R Hardness

110

Tensile Strength: Ultimate (UTS)

49 *MPa* 7.1 *x 10 ^{3} psi*

## Thermal Properties

Glass Transition Temperature

-40 *°C* -40 *°F*

Heat Deflection Temperature At 1.82 MPa (264 psi)

85 *°C* 190 *°F*

Heat Deflection Temperature At 455 kPa (66 psi)

150 *°C* 300 *°F*

Maximum Temperature: Autoignition

640 *°C* 1180 *°F*

Maximum Temperature: Corrosion

150 *°C* 300 *°F*

Maximum Temperature: Decomposition

440 *°C* 820 *°F*

Maximum Temperature: Mechanical

140 *°C* 290 *°F*

Melting Onset (Solidus)

170 *°C* 330 *°F*

Specific Heat Capacity

1120 *J/kg-K* 0.27 *BTU/lb-°F*

Thermal Conductivity

0.12 *W/m-K* 0.069 *BTU/h-ft-°F*

Thermal Expansion

120 *µm/m-K*

## Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz

7.5

Dielectric Strength (Breakdown Potential)

10 *kV/mm* 0.39 *V/mil*

Electrical Resistivity Order of Magnitude

12 *10 ^{x} Ω-m*

## Otherwise Unclassified Properties

Density

1.8 *g/cm ^{3}* 110

*lb/ft*

^{3}Limiting Oxygen Index (LOI)

49 *%*

Refractive Index

1.4

Water Absorption After 24 Hours

0 *%*

## Common Calculations

Stiffness to Weight: Axial

0.35 *points*

Stiffness to Weight: Bending

20 *points*

Strength to Weight: Axial

7.8 *points*

Strength to Weight: Bending

17 *points*

Thermal Diffusivity

0.061 *mm ^{2}/s*

Thermal Shock Resistance

27 *points*

## Followup Questions

## Further Reading

Handbook of Vinyl Formulating, 2nd ed., Richard F. Grossman (editor), 2008

Fluoroplastics: Volume 2 - Melt Processable Fluoropolymers, Sina Ebnesajjad, 2003

SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000

Modern Plastics Handbook, Charles A. Harper (editor), 1999

Plastics Materials, 7th ed., J. A. Brydson, 1999