Polystyrene (PS)

Alternative and trade names
Styrolution®, Edistir®


Transparent polymers suitable for injection molding or extrusion of complex items requiring good toughness and improved elasticity. Its key features include:

  • Transparency
  • Color consistency
  • Easy processing
  • Stiffness with good mechanical strength
  • Thermal resistance
  • Properties


    Density ρ

    1.04 - 1.05 g/cm³ at 20 °C


    Elastic modulus E

    2 - 3.3 GPa at 20 °C

    Elongation A

    1 - 7 % at 20 °C

    Impact strength, Charpy notched Ivnot

    2 - 6 kJ/m² at 20 °C

    Impact strength, Charpy unnotched Iunnot

    7 - 18 kJ/m² at 20 °C

    Max allowed stress σmax

    20 - 60 MPa at 20 °C

    at 1-7% strain


    Coefficient of thermal expansion α

    6E-5 - 9E-5 1/K at 20 °C


    UL 94 HB

    Max service temperature, long Tmaxlong

    60 - 80 °C

    Max service temperature, short Tmaxshort

    75 - 90 °C

    Specific heat capacity cp

    1300 J/(kg·K) at 20 °C

    Thermal conductivity λ

    0.16 - 0.18 W/(m·K) at 20 °C


    Dielectric constant εr

    2.4 - 2.5 [-] at 20 °C

    Electrical resistivity ρel

    1.00E+14 Ω·m at 20 °C




    Technological properties

    Application areas

    Packaging food, packaging cosmetics, horticultural pots, insulation panels

    Processing methods

    Injection molding, extrusion, thermoforming, foaming

    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.