Polyetherimide

Polyetherimide (PEI; branded as Ultem) is an amorphous, amber-to-transparent thermoplastic with characteristics similar to the related plastic PEEK. When comparing PEI to PEEK, the former is cheaper but has lower impact strength and a tighter temperature range.

Not to be confused with Polyethylenimine, also known as PEI.
Polyetherimide
Names
Other names
PEI, Ultem
Identifiers
ChemSpider
  • none
ECHA InfoCard 100.126.800
Properties
(C37H24O6N2)n
Molar mass Variable
Appearance Amber-to-transparent solid
Density 1.27 g/cm3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Due to its adhesive properties and chemical stability it became a popular bed material for FFF 3D printers.

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