Polymethylmethyacrylimide (PMMI)

Alternative and trade names
Acrymid®, Pleximid®
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Description

Its key features include:


  • excellent transmission and clarity
  • Very high mechanical strength and rigidity
  • Good weather resistance
  • High stability of the optical characteristics at long-lasting thermal load.
  • Highest heat deflection temperature under load.
  • 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.

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    Properties

    General

    PropertyValue

    Density

    1.21 - 1.22 g/cm³

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    Mechanical

    PropertyValueComment

    Elastic modulus

    4.0 - 4.1 GPa

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    Elongation

    3 %

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    Impact strength, Charpy notched

    1.4 kJ/m²

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    Impact strength, Charpy unnotched

    20 kJ/m²

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    Tensile strength

    80.0 - 90.0 MPa

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    at 3% strain

    Thermal

    PropertyValue

    Coefficient of thermal expansion

    4.5e-05 - 8e-05 1/K

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    Flammability

    UL 94 HB

    Optical

    PropertyValue

    Transparency

    yes

    Technological properties

    Property
    Application areas

    automotive head- and rear lights, optical fibres, sun roofs, packaging for cosmetics

    Processing methods

    Injection molding, extrusion