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DAP vs. PMP

DAP belongs to the thermoset plastics classification, while PMP belongs to the thermoplastics. There are 18 material properties with values for both materials. Properties with values for just one material (6, 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 DAP and the bottom bar is PMP.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 13
1.1
Elongation at Break, % 31
30
Impact Strength: Notched Izod, J/m 14
130
Tensile Strength: Ultimate (UTS), MPa 28
24

Thermal Properties

Glass Transition Temperature, °C 150
30
Specific Heat Capacity, J/kg-K 1450
1750
Thermal Conductivity, W/m-K 0.6
0.17
Thermal Expansion, µm/m-K 25
120

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 5.2
2.1
Dielectric Strength (Breakdown Potential), kV/mm 40
28
Electrical Resistivity Order of Magnitude, 10x Ω-m 13
14

Otherwise Unclassified Properties

Density, g/cm3 1.7
0.83

Common Calculations

Stiffness to Weight: Axial, points 4.1
0.74
Stiffness to Weight: Bending, points 46
41
Strength to Weight: Axial, points 4.5
8.0
Strength to Weight: Bending, points 12
22
Thermal Diffusivity, mm2/s 0.24
0.12
Thermal Shock Resistance, points 6.3
13