polyetherimide

chemical compound

Also known as: PEI, Ultem

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July 1, 2026

Quick Summary

Polyetherimide (PEI) is a type of polyimide, which are polymers characterized by imide linkages. These linkages involve two carbonyl groups attached to a single nitrogen atom. Polyimides are known for their high temperature stability, strength, and resistance to wear and corrosion.12

PEI specifically combines the imide function with ether groups. These materials are amorphous plastics used in applications requiring high performance, such as in aircraft components, sporting goods, and electronics.1

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major industrial polymers
Polyimides
…Torlon by Amoco Corporation) and polyetherimide (PEI; trademark Ultem); these two compounds combine the imide function with amide and ether groups, respectively.
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…Torlon by Amoco Corporation) and polyetherimide (PEI; trademark Ultem); these two compounds combine the imide function with amide and ether groups, respectively.
Read More