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RPU vs. PET

RPU belongs to the thermoset plastics classification, while PET belongs to the thermoplastics. There are 12 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is RPU and the bottom bar is PET.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.2
3.5 to 11
Elongation at Break, % 90
2.5 to 70
Flexural Modulus, GPa 2.0
8.3 to 14
Tensile Strength: Ultimate (UTS), MPa 60
60 to 140

Thermal Properties

Maximum Temperature: Autoignition, °C 380
410
Maximum Temperature: Decomposition, °C 270
390
Specific Heat Capacity, J/kg-K 1750
1000 to 1150

Otherwise Unclassified Properties

Density, g/cm3 1.2
1.4 to 1.6

Common Calculations

Stiffness to Weight: Axial, points 1.0
1.2 to 4.4
Stiffness to Weight: Bending, points 36
32 to 54
Strength to Weight: Axial, points 14
12 to 27
Strength to Weight: Bending, points 28
25 to 41