Butyl Rubber (IIR vulcanized) vs EPDM (ethylene propylene diene vulcanized)
Property comparison of Butyl Rubber (IIR vulcanized) and EPDM (ethylene propylene diene vulcanized), both rubber elastomer.
| Property | Butyl Rubber (IIR vulcanized) | EPDM (ethylene propylene diene vulcanized) | Difference |
|---|---|---|---|
| Tensile strength | 14 MPa | 14 MPa | 0% |
| Elongation | 500 % | 400 % | -20% |
| Poisson ratio | 0.5 | 0.5 | 0% |
| Density | 1,270 kg/m³ | 1,150 kg/m³ | -9% |
| Thermal conductivity | 0.09 W/m·K | 0.25 W/m·K | +178% |
| Specific heat | 1,900 J/kg·K | 1,900 J/kg·K | 0% |
| Coefficient of thermal expansion | 0.00019 1/K | 0.00017 1/K | -11% |
Difference is EPDM (ethylene propylene diene vulcanized) relative to Butyl Rubber (IIR vulcanized). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- standard
- ASTM
- standard
- ASTM
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators