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PMP vs. PS

Both PMP and PS are thermoplastics. There are 18 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is PMP and the bottom bar is PS.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 1.1
1.9 to 2.9
Elongation at Break, % 30
1.8 to 40
Impact Strength: Notched Izod, J/m 130
19 to 45
Tensile Strength: Ultimate (UTS), MPa 24
32 to 44

Thermal Properties

Glass Transition Temperature, °C 30
100
Maximum Temperature: Mechanical, °C 140
70
Specific Heat Capacity, J/kg-K 1750
1250 to 1400
Thermal Conductivity, W/m-K 0.17
0.14 to 0.22
Thermal Expansion, µm/m-K 120
80 to 98

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 28
18 to 20
Electrical Resistivity Order of Magnitude, 10x Ω-m 14
14 to 15

Otherwise Unclassified Properties

Density, g/cm3 0.83
1.0

Common Calculations

Stiffness to Weight: Axial, points 0.74
1.0 to 1.5
Stiffness to Weight: Bending, points 41
40 to 45
Strength to Weight: Axial, points 8.0
8.5 to 12
Strength to Weight: Bending, points 22
22 to 26
Thermal Diffusivity, mm2/s 0.12
0.11 to 0.15
Thermal Shock Resistance, points 13
11 to 15