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PS vs. PCTFE

Both PS and PCTFE are thermoplastics. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.9 to 2.9
1.4
Elongation at Break, % 1.8 to 40
150
Flexural Strength, MPa 62 to 80
59
Impact Strength: Notched Izod, J/m 19 to 45
160
Tensile Strength: Ultimate (UTS), MPa 32 to 44
36

Thermal Properties

Glass Transition Temperature, °C 100
100
Maximum Temperature: Autoignition, °C 360 to 420
580
Maximum Temperature: Decomposition, °C 320 to 330
370
Maximum Temperature: Mechanical, °C 70
150
Specific Heat Capacity, J/kg-K 1250 to 1400
920
Thermal Conductivity, W/m-K 0.14 to 0.22
0.21
Thermal Expansion, µm/m-K 80 to 98
130

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 18 to 20
21
Electrical Resistivity Order of Magnitude, 10x Ω-m 14 to 15
16

Otherwise Unclassified Properties

Density, g/cm3 1.0
2.1
Limiting Oxygen Index (LOI), % 18
80
Water Absorption After 24 Hours, % 0.040 to 0.080
0.0094

Common Calculations

Stiffness to Weight: Axial, points 1.0 to 1.5
0.37
Stiffness to Weight: Bending, points 40 to 45
17
Strength to Weight: Axial, points 8.5 to 12
4.6
Strength to Weight: Bending, points 22 to 26
11
Thermal Diffusivity, mm2/s 0.11 to 0.15
0.11
Thermal Shock Resistance, points 11 to 15
14