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PBT vs. CSM Rubber

PBT belongs to the thermoplastics classification, while CSM rubber belongs to the thermoset elastomers (rubber). There are 7 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is PBT and the bottom bar is CSM rubber.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 1.3 to 1.5
1.2
Elongation at Break, % 2.5 to 43
400
Glass Transition Temperature, °C 40
0
Limiting Oxygen Index (LOI), % 20
25
Strength to Weight: Axial, points 12 to 25
2.1
Strength to Weight: Bending, points 25 to 38
8.0
Tensile Strength: Ultimate (UTS), MPa 58 to 140
9.0