Evonik Rohacell® 71 FX Polymethacrylimide (PMI) Rigid Foam Plastic

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Evonik Rohacell® 71 FX Polymethacrylimide (PMI) Rigid Foam Plastic (discontinued **)
Categories:	Other Engineering Material; Composite Core Material; Polymer; Thermoset; Polymethacrylimide
Material Notes:	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. It has a very homogeneous cell structure and isotropic properties. Specific Notes for this Material: ROHACELL® FX is a closed-cell rigid foam plastic based on PMI (polymethacrylimide) which does not contain any CFCs. The fields of application for ROHACELL® FX are the construction of wind turbine blades and railcar structures. Curing temperature up to 130C (266F). Curing pressure up to 0.2 MPa (30 psi). Sandwich components using ROHACELL® FX as a core material can be realized in a single work step (=cocuring). Other commonly used techniques such as SCRIMP are applicable. ROHACELL® FX is easy to shape. Thermoformability is another advantage of the core material. Information provided by degussa. Evonik Industries is the successor company to Degussa.
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Physical Properties	Original Value	Comments

Density	4.68 lb/ft³	DIN 53420, ISO 845, ASTM D 1622

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	1.50 MPa	DIN 53455, ISO 527-2, ASTM D 638
Elongation at Break	9.0 %	DIN 53455, ISO 527-2, ASTM D 638
Modulus of Elasticity	0.0650 GPa	ISO 527-2, ASTM D 638
Compressive Strength	0.800 MPa	DIN 53421, ISO 844, ASTM D 1621
Poissons Ratio	0.25	Calculated
Shear Modulus	0.0260 GPa	DIN 53294, ASTM C 273
Shear Strength	0.700 MPa	DIN 53294, ASTM C 273

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	180 °C	Heat Distortion Resistance; DIN 53424

**
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PROHA25 / 66330

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