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PEI vs. SBR Rubber

PEI belongs to the thermoplastics classification, while SBR rubber belongs to the thermoset elastomers (rubber). There are 11 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 PEI and the bottom bar is SBR rubber.

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 3.0 to 34
530
Tensile Strength: Ultimate (UTS), MPa 110 to 160
14

Thermal Properties

Glass Transition Temperature, °C 210
-30
Maximum Temperature: Mechanical, °C 170
100
Specific Heat Capacity, J/kg-K 1050 to 1220
1880
Thermal Conductivity, W/m-K 0.18 to 0.23
0.17

Otherwise Unclassified Properties

Density, g/cm3 1.3 to 1.5
1.1
Limiting Oxygen Index (LOI), % 47 to 50
18

Common Calculations

Strength to Weight: Axial, points 24 to 30
3.4
Strength to Weight: Bending, points 40 to 44
11
Thermal Diffusivity, mm2/s 0.11 to 0.14
0.082