Phthalonitrile resin PN-3М (PN-CF)



PN-3M is a single part phthalonitrile carbon fiber reinforced 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
  • Properties


    Compressive modulus Ecomp

    64 MPa at 20 °C

    ASTM D695

    Compressive strength Rmc

    623 MPa at 20 °C

    ASTM D6641

    Elastic modulus E

    69 GPa at 20 °C

    ASTM D3039

    Shear modulus, G₁₂ G12

    5.7 GPa at 20 °C

    ASTM D5379

    Shear strength, τ₁₂ τ12

    75 MPa at 300 °C

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    Shear strength, τ₁₃ τ13

    36 MPa at 25 °C

    ASTM D2344

    Show chart

    Tensile strength Rm

    717 MPa at 20 °C

    ASTM D3039

    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 history

    Samples for testing were obtained by vacuum infusion based on PN-3M resin and carbon fabric 22502 (twill 2x2, 200 g/m2, HTA40-3K, 3.95 GPa).

    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.