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LDPE vs. RPU

LDPE belongs to the thermoplastics classification, while RPU belongs to the thermoset plastics. There are 15 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 LDPE and the bottom bar is RPU.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.3
2.2
Tensile Strength: Ultimate (UTS), MPa 7.0
60

Thermal Properties

Maximum Temperature: Autoignition, °C 380
380
Maximum Temperature: Decomposition, °C 400
270
Specific Heat Capacity, J/kg-K 2300
1750
Thermal Conductivity, W/m-K 0.36
0.19
Thermal Expansion, µm/m-K 220
63
Vicat Softening Temperature, °C 50
120

Otherwise Unclassified Properties

Density, g/cm3 0.92
1.2

Common Calculations

Stiffness to Weight: Axial, points 0.18
1.0
Stiffness to Weight: Bending, points 24
36
Strength to Weight: Axial, points 2.1
14
Strength to Weight: Bending, points 8.8
28
Thermal Diffusivity, mm2/s 0.17
0.090
Thermal Shock Resistance, points 7.6
31