Phthalonitrile resin PN-3М cured 180°C



PN-3M is a single part phthalonitrile resin with higher glass transition temperature and outstanding thermal stability, specially developed for vacuum infusion and RTM technologies. Pre-curing at 180°C allows to remove parts from tool after cooling. Post-curing provides glass transition temperature above 450°C. Moreover, PN-3M does not support combustion. Can be used for high temperature tooling up to 450°C. It shows the following features and properties:

  • One-part resin system
  • Epoxy-like processability
  • Incombustible
  • Decomposition temperature 520°C
  • Low moisture saturation
  • Low softening temperature 80°C
  • Ashby charts

    See where falls on the material property chart for Density against Elastic modulus in your materials selection and design process.



    Density ρ

    1.34 g/cm³ at 20 °C

    ASTM D792


    Elastic modulus E

    4.8 GPa at 20 °C

    ASTM D638

    Flexural modulus Ebend

    4.6 GPa at 20 °C

    ASTM D790

    Flexural strength σbend

    4.6 MPa at 20 °C

    ASTM D790

    Fracture toughness KIC

    0.76 MPa·√m at 20 °C

    ASTM D5045

    Strain energy release GIC

    ASTM D5045

    Tensile strength Rm

    60 MPa at 20 °C

    ASTM D638


    Coefficient of thermal expansion α

    9E-5 1/K at 20 °C

    ASTM E831

    Heat deflection temperature HDT

    200 °C

    ASTM E2092

    Vicat softening temperature Tsoft

    80 °C


    Curie temperature Tc

    180 °C

    Technological properties

    Application areas

    Structures requiring high heat resistance;Parts requiring non-combustibility;Parts of engines and other special applications;High temperature tooling for thermoplastics

    Processing methods

    Assemble the vacuum bag. Perform a leak test, the rate of the vacuum drop should not be more than 1 mbar per minute. The residual pressure in the bag must not be more than 10 mbar. Assemble the second vacuum bag, put airweave material between the layers of the vacuum film. Perform a leak test for the second vacuum bag. The residual pressure in the bag must not be more than 10 mbar. Degas for 30-40 minutes, at 150-160°C, at a pressure of no more than 10 mbar. During the degassing, the resin should be stirred intensively. Heat the tool up to 150-170°C. Maintaining the temperature of resin dispenser at 160°C, start the infusion process. After complete impregnation of the bag, close the resin inputs, but continue evacuation from the inner bag for at least 30 minutes. Then close the outputs from the inner bag. Maintain the outer vacuum bag until the end of curing process. Increase the temperature at a rate of 2°C/min to 180°C. Dwell at 180°C for 6 hours. Before removing the part, cool the mold to at least 60°C at a speed of no more than 5°C/min. Post-cure can be performed without tooling. Heat to 180°C at a rate of 2°C/min, then heat to 375°C at a rate of 5-10°C/min. Dwell at 375°C for 8 hours. Cool down the part to 60°C at rate <5°C/min. For the measurement of vacuum, the use of absolute pressure sensors is recommended.

    This material data has been provided by Itecma.

    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.