Technical Documents
ROHACELL 51 is a low density grade and a very high strength:weight ratio.
Details
Product Type
Applications
Producer
Supplier
Chemical Composition
ROHACELL is manufactured by hot forming of methacrylic acid/methacrylonitrile copolymer sheets. During foaming this copolymer is converted to polymethacrylimide.Information supplied by Emkay Plastics, Ltd
Advantages
- low density grade
- very high strength
- closed-cell rigid expanded plastic material for light weight sandwich construction
- excellent mechanical properties
- high dimensional stability under heat
- solvent resistance
- particularly at low temperature, a low thermal conductivity
- highest strength and moduli values
- highest for any foamed plastic in its density range
Technical data
Quantity | Value | Unit | Comment |
---|---|---|---|
Appearance Properties | |||
Appearance | White | ||
Physical Properties | |||
Density | 0.0513 | g/ml | ASTM D1622-63 |
Thermal Properties | |||
Thermal Expansion | 33.0 | µm/m-°C | ASTM D696-70@Temperature 20.0 °C; Linear |
Thermal Expansion | 24.0 | µm/m-°C | Temperature -100 °C; Linear@ |
Thermal Conductivity | 0.0290 | W/mk | ASTM C177-63 |
Maximum Service Temperature | 180 | ºC | Dimensional stability per DIN 53424 |
Mechanical Properties | |||
shear strength | 0.786 | MPa | ASTM C273-61 |
Tensile modulus-MD | 68.6 | MPa | ASTM D638-68 |
Compressive Strength | 0.883 | MPa | ASTM D1621-64; at Yield |
shear modulus | 18.6 | MPa | ASTM C273-61 |
Flexural strength | 1.57 | MPa | ASTM D790-66; at Yield |
Tensile strength | 1.86 | MPa | ASTM D638-68 |
Elongation at break-MD | 4.0 | % | ASTM D638-68 |
Chemical Properties | |||
Moisture absorption | 1.3 | % | at Equilibrium;15% RH |
Moisture absorption | 2.6 | % | at Equilibrium; 30% RH |
Moisture absorption | 4.2 | % | at Equilibrium;50% RH |
Moisture absorption | 5.0 | % | at Equilibrium; 65 RH |
Moisture absorption | 17.4 | % | at Equilibrium; 98% RH |
Water absorption | 15 | % | 50days immersion at 20°C; at Saturation |
Moisture Expansion | <2.0 | % | 50days immersion at 20°C |
Oxirane Oxygen Content | 19 - 20 | % | |
Electrical Properties | |||
Dissipation Factor | 0.00020 | Frequency 2.00e+9 Hz@ | |
Dissipation Factor | 0.0011 | Frequency 1e+10 Hz@ | |
Dielectric Constant | 1.06 | Frequency 1e+10 Hz@ | |
Dielectric Constant | 1.07 | Frequency 2.00e+9 Hz@ | |
Dielectric Constant | 1.11 | Frequency 2.60e+10 Hz@ | |
Dissipation Factor | 0.00040 | Frequency 5.00e+9 Hz@ | |
Dissipation Factor | 0.0050 | Frequency 2.60e+10 Hz@ | |
Surface Resistance | 9.00e+12 | ohm | |
Dielectric Constant | 1.09 | Frequency 5.00e+9 Hz@ |