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PCTFE vs. Thermoset PI

PCTFE belongs to the thermoplastics classification, while thermoset PI belongs to the thermoset plastics. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is PCTFE and the bottom bar is thermoset PI.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 38
120 to 210
Elongation at Break, % 150
2.0 to 5.9
Flexural Modulus, GPa 1.2
3.1 to 4.8
Flexural Strength, MPa 59
60 to 100
Impact Strength: Notched Izod, J/m 160
21 to 43
Tensile Strength: Ultimate (UTS), MPa 36
37 to 81

Thermal Properties

Glass Transition Temperature, °C 100
360
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 110
370
Maximum Temperature: Autoignition, °C 580
380
Maximum Temperature: Decomposition, °C 370
330
Maximum Temperature: Mechanical, °C 150
260
Specific Heat Capacity, J/kg-K 920
1130
Thermal Conductivity, W/m-K 0.21
0.29 to 1.7
Thermal Expansion, µm/m-K 130
38 to 54

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 21
20
Electrical Resistivity Order of Magnitude, 10x Ω-m 16
15

Otherwise Unclassified Properties

Density, g/cm3 2.1
1.4 to 1.6
Limiting Oxygen Index (LOI), % 80
40
Water Absorption After 24 Hours, % 0.0094
0.14 to 0.24

Common Calculations

Strength to Weight: Axial, points 4.6
6.5 to 16
Strength to Weight: Bending, points 11
16 to 30
Thermal Diffusivity, mm2/s 0.11
0.18 to 0.95