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LDPE vs. PEI

Both LDPE and PEI are thermoplastics. There are 15 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is LDPE and the bottom bar is PEI.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.3
3.4 to 5.6
Tensile Strength: Ultimate (UTS), MPa 7.0
110 to 160

Thermal Properties

Glass Transition Temperature, °C -130
210
Maximum Temperature: Autoignition, °C 380
530
Maximum Temperature: Decomposition, °C 400
530
Specific Heat Capacity, J/kg-K 2300
1050 to 1220
Thermal Conductivity, W/m-K 0.36
0.18 to 0.23
Thermal Expansion, µm/m-K 220
20 to 53

Otherwise Unclassified Properties

Density, g/cm3 0.92
1.3 to 1.5

Common Calculations

Stiffness to Weight: Axial, points 0.18
1.5 to 2.1
Stiffness to Weight: Bending, points 24
39
Strength to Weight: Axial, points 2.1
24 to 30
Strength to Weight: Bending, points 8.8
40 to 44
Thermal Diffusivity, mm2/s 0.17
0.11 to 0.14
Thermal Shock Resistance, points 7.6
44 to 100