Polyimide (PI)

PI (Polyimide) is a polymer of imide monomers.  Typical monomers include pyromellitic dianhydride and 4,4'-oxydianiline.

According to the composition of their main chain, polyimides can be:

  • Aliphatic (linear polyimides)
  • Semi-aromatic
  • Aromatic: R' and R" are two carbon atoms of an aromatic ring. These are the most used polyimides because of their thermostability.

According to the type of interactions between the main chains, polyimides can be:

  • Thermoplastic:
    very often called pseudothermoplastic
  • Thermosetting:
    commercially available as uncured resins, polyimide solutions, stock shapes, thin sheets, laminates and machined parts.

More Information on polyimide


  • History

    Polyimides have been in mass production since 1955.
  • Properties

  • Applications

  • Processes

Types of plastics

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