Properties
EPDM exhibits satisfactory compatibility with fireproof hydraulic fluids, ketones, hot and cold water, and alkalis, and unsatisfactory compatibility with most oils, gasoline, kerosene, aromatic and aliphatic hydrocarbons, halogenated solvents and concentrated acids.
The main properties of EPDM are its outstanding heat, ozone and weather resistance. The resistance to polar substances and steam are also good. It has excellent electrical insulating properties.
Typical properties of EPDM vulcanizates are given below. EPDM can be compounded to meet specific properties to a limit depending first on the EPDM polymers available, then the processing and curing method(s) employed. EPDMs are available in a range of molecular weights (indicated in terms of Mooney viscosity ML(1+4) at 125 °C), varying levels of ethylene, third monomer and oil content.
| Property | Value |
|---|---|
| Hardness, Shore A | 40–90 |
| Tensile failure stress, ultimate | 25 MPa |
| Density | Can be compounded from 0.90 to >2.00 g/cm3 |
| Property | Value |
|---|---|
| Coefficient of thermal expansion, linear | 160 µm/m·K |
| Maximum service temperature | 150 °C |
| Minimum service temperature | −50 °C |
| Glass temperature | −54 °C |
Read more about this topic: EPDM Rubber
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