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DAP vs. Silicone Plastic

Both DAP and silicone plastic 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 DAP and the bottom bar is silicone plastic.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 1.7
1.9

Common Calculations

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