Characteristic
Physical outlooks of the EP(D)M Synthetic Rubber are white solid, stable in room temperature. Products containing extender oil show yellow color, and the products used for blending thermoplasticity are transparent pellet. Physical properties of EP(D)M Synthetic Rubber is listed in the table below.
Typical Physical Characteristics Raw EP(D)M Polymers
| Specific Gravity | 0.86 to 0.89 |
|---|---|
| Specific Heat Cp, J/(g K) | 2.2 |
| Thermal Conductivity, kW/(m K) | 1757 |
| Thermal Diffusivity, cm/s | 1.9 x 10^-3 |
| Thermal Coefficient of Linear Expansion, 1/℃ | 2.5 x 10^-4 |
|---|---|
| Brittle Point, ℃ | -55 to -65 |
| Glass Transition Temperature, ℃ | -40 to -60 |
| Air Permeability, cm2/s atm | 100 |
※ EP(D)M Synthetic Rubber is processed mixed with various rubber compound blenders. Final properties of the rubber compound is influenced by the structural factors of the EP(D)M Base Polymer.
Product form
| DENSE BALE | Normal bale product |
|---|---|
| FRIABLE BALE | Improved processing and dispersion ability |
| PELLET | Improved processing and improved processing with thermoplastic resin (PP and PE etc.) |
|---|---|
| OIL EXTENDED | Processing improvement product |
Structural Factors EP[D]M
“Indicates the average molecular weight, measured by Mooney viscosity”
| Increase | Decrease |
|---|---|
| Mooney Viscosity | Processability |
| Green Strength | Extrudability |
| Tensile Strength | |
| Tear Strength | |
| Crosslink Density | |
| Thermal Resistance |
