General Polymethacrylimide, foam (PMI)

Alternative and trade names
Rohacell®
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Description

The key features are:


  • Excellent mechanical properties over a wide temperature range, even at low densities
  • High temperature resistance up to 210°C
  • Unique compressive creep behavior for processing up to 180°C and 0.7 MPa
  • Excellent dynamic strength
  • Cell sizes that can be tailored for each processing method
  • Properties

    General

    Density ρ

    0.03 - 0.3 g/cm³ at 20 °C

    Mechanical

    Elastic modulus E

    0.04 - 0.39 GPa at 20 °C

    Elongation A

    3 - 11 % at 20 °C

    Max allowed stress σmax

    43112 MPa at 20 °C

    at 3-11% strain

    Thermal

    Coefficient of thermal expansion α

    3E-5 - 4E-5 1/K at 20 °C

    Flammability

    UL 94 V0

    Electrical

    Dielectric constant εr

    1 - 1.1 [-] at 20 °C

    Optical

    Transparency

    no

    Technological properties

    Application areas

    Core material for aircraft components, core material for wind turbine blades, structural core for radomes

    Fillers

    Unfilled, no additives.

    Processing methods

    Foaming, thermoforming

    This material data has been provided by M-Base.

    All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
    Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.