Silicone Plastic vs. PFA

Silicone plastic belongs to the thermoset plastics classification, while PFA belongs to the thermoplastics. There are 10 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

For each property being compared, the top bar is silicone plastic and the bottom bar is PFA.

Silicone Plastic Perfluoroalkoxy (PFA)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		1.9
Density, g/cm³		2.2

Dielectric Strength (Breakdown Potential), kV/mm		30
Dielectric Strength (Breakdown Potential), kV/mm		22

Electrical Resistivity Order of Magnitude, 10^x Ω-m		12
Electrical Resistivity Order of Magnitude, 10^x Ω-m		16

Specific Heat Capacity, J/kg-K		850
Specific Heat Capacity, J/kg-K		1000

Strength to Weight: Axial, points		5.5
Strength to Weight: Axial, points		3.9

Strength to Weight: Bending, points		13
Strength to Weight: Bending, points		10

Tensile Strength: Ultimate (UTS), MPa		38
Tensile Strength: Ultimate (UTS), MPa		30

Thermal Conductivity, W/m-K		0.35
Thermal Conductivity, W/m-K		0.25

Thermal Diffusivity, mm²/s		0.22
Thermal Diffusivity, mm²/s		0.12

Thermal Expansion, µm/m-K		35
Thermal Expansion, µm/m-K		120

Silicone Plastic vs. PFA

Material Properties

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