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Epoxy vs. RTPU

Epoxy belongs to the thermoset plastics classification, while RTPU belongs to the thermoplastics. There are 17 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is epoxy and the bottom bar is RTPU.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 2.4
4.0
Elongation at Break, % 4.5
5.0
Tensile Strength: Ultimate (UTS), MPa 67
75

Thermal Properties

Maximum Temperature: Autoignition, °C 430
270
Maximum Temperature: Decomposition, °C 430
320
Specific Heat Capacity, J/kg-K 1500
1760
Thermal Conductivity, W/m-K 0.2
0.6
Thermal Expansion, µm/m-K 100
100

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 16
24
Electrical Resistivity Order of Magnitude, 10x Ω-m 13
14

Otherwise Unclassified Properties

Density, g/cm3 1.3
1.1

Common Calculations

Stiffness to Weight: Axial, points 1.0
2.1
Stiffness to Weight: Bending, points 34
50
Strength to Weight: Axial, points 14
20
Strength to Weight: Bending, points 28
38
Thermal Diffusivity, mm2/s 0.1
0.32
Thermal Shock Resistance, points 20
13