Home

MK Plastics Technical Data

Subcategory: Composite Core Material; Polymer; Polymethacrylimide; Thermoset

Material Notes:

51HF is a high frequency Rohacell used in Radar and X-Ray applications. This can also be used for model making.
 

General ROHACELL Information: ROHACELL is a closed-cell rigid expanded plastic material for lightweight sandwich construction. It has excellent mechanical properties, high dimensional stability under heat, solvent resistance and, particularly at low temperature, a low thermal conductivity. The strength and moduli values are the highest for any foamed plastic in its density range. ROHACELL is manufactured by hot forming of methacrylic acid/methacrylonitrile copolymer sheets. During foaming this copolymer is converted to polymethacrylimide.

Rohacell 51 HF

Properties Unit/Metric ROHACELL 51 WF Standard
Density kg/m³ 52 ISO 845
ibs./cu.ft. 3.25 ASTM D 1622
Compressive Strength MPa 0.9 ISO 844
psi 130 ASTM D 1621
Tensile Strength MPa 1.9 ISO 527-2
psi 275 ASTM D 638
Shear Strength MPa 0.8 DIN 53294
psi 116 ASTM C 273
Elastic Modulus MPa 70 ISO 572-2
psi 10,150 ASTM D 638
Shear Modulus MPa 19 DIN 53294
psi 2,755 ASTM C 273
Strain at break % 4.0 ISO 527-2
     
Electrical Properties
Dielectric Constant 1.057 1.057 2.5 GHz
Dielectric Constant 1.065 1.065 5.0 GHz
Dielectric Constant 1.067 1.067 10.0 GHz
Dielectric Constant 1.048 1.048 26.5 GHz
Loss Tangent <0.0002 <0.0002 2.5 GHz
Loss Tangent 0.0008 0.0008 5.0 GHz
Loss Tangent 0.0041 0.0041 10.0 GHz
Loss Tangent 0.0135 0.0135 26.5 GHz