myTechnical Documents
Description: ROHACELL® is produced by thermal expansion of a co-polymer sheet of methacrylic acid and methacrylonitrile. During the foaming process the copolymer sheet is converted to PMI- PolyMethacrylImide. Alcohol is used as a blowing agent,thus ROHACELL® contains no fluorinated carbon hydrates and is halogen free. Information provided by degussa.
Details
Product Type
Producer
Supplier
Advantages
- very homogeneous cell structure
- isotropic properties
- increased heat distortion resistance
- closed-cell rigid foam plastic based on PMI (polymethacrylimide)
- does not contain any CFCs
- serves as a core material in advanced sandwich components
- easy to shape
- Thermoformability
- Curing temperature up to 180C (356F)
- Curing pressure up to 0.70 MPa (100 psi)
- Sandwich components using ROHACELL® WF as core material can be realized in a single work step (= cocuring). The structural components can be manufactured in an autoclave and by means of RTM.
Other Applications
used in aircraft and spacecraft construction
Technical data
| Quantity | Value | Unit | Comment |
|---|---|---|---|
| Physical Properties | |||
| Density | 0.110 | g/ml | DIN 53420, ISO 845, ASTM D 1622 |
| Thermal Properties | |||
| Maximum Service Temperature | 200 | ºC | Heat Distortion Resistance; DIN 53424; Air |
| Mechanical Properties | |||
| Flexural strength | 5.20 | MPa | DIN 53423, ISO 1209, ASTM D 790 |
| Poisson's ratio | 0.29 | Calculated | |
| Tensile modulus-MD | 180 | MPa | ISO 527-2, ASTM D 638 |
| Compressive Strength | 3.60 | MPa | DIN 53421, ISO 844, ASTM D 1621 |
| Elongation at break-MD | 3.0 | % | DIN 53455, ISO 527-2, ASTM D 638 |
| Tensile Stress at break-MD | 3.70 | MPa | DIN 53455, ISO 527-2, ASTM D 638 |
| shear modulus | 70 | MPa | DIN 53294, ASTM C 273 |
| shear strength | 2.40 | MPa | DIN 53294, ASTM C 273 |