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Thermoset PI vs. Melamine

Both thermoset PI and melamine are thermoset plastics. There are 13 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 thermoset PI and the bottom bar is melamine.

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 2.0 to 5.9
1.0
Tensile Strength: Ultimate (UTS), MPa 37 to 81
30

Thermal Properties

Maximum Temperature: Autoignition, °C 380
350
Maximum Temperature: Decomposition, °C 330
350
Specific Heat Capacity, J/kg-K 1130
1200
Thermal Conductivity, W/m-K 0.29 to 1.7
0.5
Thermal Expansion, µm/m-K 38 to 54
60

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm 20
30
Electrical Resistivity Order of Magnitude, 10x Ω-m 15
9.0

Otherwise Unclassified Properties

Density, g/cm3 1.4 to 1.6
1.5

Common Calculations

Strength to Weight: Axial, points 6.5 to 16
5.6
Strength to Weight: Bending, points 16 to 30
14
Thermal Diffusivity, mm2/s 0.18 to 0.95
0.28