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PPE vs. CR Rubber

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

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 30
380
Tensile Strength: Ultimate (UTS), MPa 55
11

Thermal Properties

Glass Transition Temperature, °C 85
-45
Maximum Temperature: Autoignition, °C 430
410
Maximum Temperature: Mechanical, °C 90
130
Specific Heat Capacity, J/kg-K 1200
1120
Thermal Conductivity, W/m-K 0.22
0.19

Otherwise Unclassified Properties

Density, g/cm3 1.1
1.5

Common Calculations

Strength to Weight: Axial, points 14
1.9
Strength to Weight: Bending, points 30
7.1
Thermal Diffusivity, mm2/s 0.17
0.11