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	Metric	English	Comments

Density	0.0750 g/cc	0.00271 lb/in³	DIN 53420, ISO 845, ASTM D 1622

Mechanical Properties	Metric	English	Comments
Tensile Strength at Break	1.50 MPa	218 psi	DIN 53455, ISO 527-2, ASTM D 638
Elongation at Break	9.0 %	9.0 %	DIN 53455, ISO 527-2, ASTM D 638
Modulus of Elasticity	0.0650 GPa	9.43 ksi	ISO 527-2, ASTM D 638
Compressive Strength	0.800 MPa	116 psi	DIN 53421, ISO 844, ASTM D 1621
Poissons Ratio	0.25	0.25	Calculated
Shear Modulus	0.0260 GPa	3.77 ksi	DIN 53294, ASTM C 273
Shear Strength	0.700 MPa	102 psi	DIN 53294, ASTM C 273

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	180 °C	356 °F	Heat Distortion Resistance; DIN 53424

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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PROHA25 / 66330

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