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General Polymethacrylimide, foam (PMI)

Alternative and trade names
Rohacell®
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Description

Unfilled, no additives.

Properties

Electrical

Dielectric constant εr

1 - 1.1 [-] at 20 °C

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

Optical

Transparency

no

Thermal

Coefficient of thermal expansion α

3E-5 - 4E-5 1/K at 20 °C

Flammability

UL 94 V0

Technological properties

Application areas

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

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.