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PPE vs. ECTFE

Both PPE and ECTFE are thermoplastics. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is PPE and the bottom bar is ECTFE.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.3
1.6
Elongation at Break, % 30
230
Flexural Strength, MPa 75
47
Tensile Strength: Ultimate (UTS), MPa 55
49

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C 120
91
Maximum Temperature: Autoignition, °C 430
620
Maximum Temperature: Mechanical, °C 90
150
Melting Onset (Solidus), °C 260
240
Specific Heat Capacity, J/kg-K 1200
1170
Thermal Conductivity, W/m-K 0.22
0.15
Thermal Expansion, µm/m-K 90
100

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 MHz 2.7
2.6
Dielectric Strength (Breakdown Potential), kV/mm 19
18
Electrical Resistivity Order of Magnitude, 10x Ω-m 13
14

Otherwise Unclassified Properties

Density, g/cm3 1.1
1.7
Water Absorption After 24 Hours, % 0.23
0.094

Common Calculations

Stiffness to Weight: Axial, points 1.2
0.52
Stiffness to Weight: Bending, points 42
23
Strength to Weight: Axial, points 14
8.1
Strength to Weight: Bending, points 30
18
Thermal Diffusivity, mm2/s 0.17
0.078
Thermal Shock Resistance, points 19
22