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Silicone Plastic vs. DAP

Both silicone plastic and DAP are thermoset plastics. There are 15 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 9.0
13
Tensile Strength: Ultimate (UTS), MPa 38
28

Thermal Properties

Glass Transition Temperature, °C 200
150
Specific Heat Capacity, J/kg-K 850
1450
Thermal Conductivity, W/m-K 0.35
0.6
Thermal Expansion, µm/m-K 35
25

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 30
40
Electrical Resistivity Order of Magnitude, 10x Ω-m 12
13

Otherwise Unclassified Properties

Density, g/cm3 1.9
1.7

Common Calculations

Stiffness to Weight: Axial, points 2.6
4.1
Stiffness to Weight: Bending, points 36
46
Strength to Weight: Axial, points 5.5
4.5
Strength to Weight: Bending, points 13
12
Thermal Diffusivity, mm2/s 0.22
0.24
Thermal Shock Resistance, points 8.5
6.3