Low Temperature Resistance Data
Fluoroelastomers normally have low temperature brittle points of approximately -40° F, depending on thickness of the sample. A 1/32″ thick sample will have better flex properties than a 1/8″ thick sample of the same material. Even though a sample has a brittle point of -40° F, it may lose the ability to stretch and recover at a much higher temperature (up to 0° F). Temperature Retraction tests (TR-10%) are usually performed on seal materials used for low temperature environments. Special Fluorocarbon polymers are available that provide flexibility down to -60° F and TR-10% values down to -25° F. Mosites #10282 compound contains this special polymer base and will meet the requirements of Mil-R-83485, Type II. A physical property data sheet on this product is shown below.
| Compound | Mosites #10282 |
|---|---|
| Hardness (Shore A) | 73 |
| Tensile Strength (psi) | 3150 |
| Elongation at Break (%) | 160% |
| Modulus at 100% Elongation (psi) | 1875 |
| Tear Strength (ppi) | 114 |
| % Compression Set (22 Hours at 350° F) | 4% |
| 10% Temperature Retraction (° F) | -30° F |
| Specific Gravity | 1.84 |
