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PMMA vs. DAP

PMMA belongs to the thermoplastics classification, while DAP belongs to the thermoset plastics. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 120
150
Elastic (Young's, Tensile) Modulus, GPa 3.2
13
Elongation at Break, % 4.0
31
Flexural Strength, MPa 110
62
Impact Strength: Notched Izod, J/m 74
14
Tensile Strength: Ultimate (UTS), MPa 71
28

Thermal Properties

Glass Transition Temperature, °C 110
150
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 96
160
Specific Heat Capacity, J/kg-K 1260
1450
Thermal Conductivity, W/m-K 0.19
0.6
Thermal Expansion, µm/m-K 76
25

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.6
5.2
Dielectric Strength (Breakdown Potential), kV/mm 30
40

Otherwise Unclassified Properties

Density, g/cm3 1.2
1.7

Common Calculations

Stiffness to Weight: Axial, points 1.5
4.1
Stiffness to Weight: Bending, points 42
46
Strength to Weight: Axial, points 17
4.5
Strength to Weight: Bending, points 32
12
Thermal Diffusivity, mm2/s 0.13
0.24
Thermal Shock Resistance, points 21
6.3