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CR Rubber vs. SBR Rubber

Both CR rubber and SBR rubber are thermoset elastomers (rubber).

For each property being compared, the top bar is CR rubber and the bottom bar is SBR rubber.

Material Properties

Density, g/cm3 1.5
1.1
Elongation at Break, % 380
530
Glass Transition Temperature, °C -45
-30
Limiting Oxygen Index (LOI), % 26
18
Specific Heat Capacity, J/kg-K 1120
1880
Strength to Weight: Axial, points 1.9
3.4
Strength to Weight: Bending, points 7.1
11
Tensile Strength: Ultimate (UTS), MPa 11
14
Thermal Conductivity, W/m-K 0.19
0.17
Thermal Diffusivity, m2/s 0.11
0.082