# Ethylene Chlorotrifluoroethylene (ECTFE)

ECTFE is a fluoroplastic (fluorine-based thermoplastic). It has a fairly high density and a fairly high ductility among thermoplastics. The graph bars on the material properties cards below compare ECTFE to: fluoroplastics (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

1.6 *GPa* 0.23 *x 10 ^{6} psi*

Elongation at Break

230 *%*

Flexural Modulus

1.7 *GPa* 0.24 *x 10 ^{6} psi*

Flexural Strength

47 *MPa* 6.8 *x 10 ^{3} psi*

Rockwell R Hardness

93

Tensile Strength: Ultimate (UTS)

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

## Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi)

91 *°C* 190 *°F*

Heat Deflection Temperature At 455 kPa (66 psi)

110 *°C* 220 *°F*

Maximum Temperature: Autoignition

620 *°C* 1140 *°F*

Maximum Temperature: Decomposition

450 *°C* 830 *°F*

Maximum Temperature: Mechanical

150 *°C* 310 *°F*

Melting Onset (Solidus)

240 *°C* 460 *°F*

Specific Heat Capacity

1170 *J/kg-K* 0.28 *BTU/lb-°F*

Thermal Conductivity

0.15 *W/m-K* 0.089 *BTU/h-ft-°F*

Thermal Expansion

100 *µm/m-K*

## Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz

2.3

Dielectric Constant (Relative Permittivity) At 1 MHz

2.6

Dielectric Strength (Breakdown Potential)

18 *kV/mm* 0.68 *V/mil*

Electrical Resistivity Order of Magnitude

14 *10 ^{x} Ω-m*

## Otherwise Unclassified Properties

Density

1.7 *g/cm ^{3}* 110

*lb/ft*

^{3}Limiting Oxygen Index (LOI)

60 *%*

Water Absorption After 24 Hours

0.094 *%*

## Common Calculations

Stiffness to Weight: Axial

0.52 *points*

Stiffness to Weight: Bending

23 *points*

Strength to Weight: Axial

8.1 *points*

Strength to Weight: Bending

18 *points*

Thermal Diffusivity

0.078 *mm ^{2}/s*

Thermal Shock Resistance

22 *points*

## Followup Questions

## Further Reading

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