Polyetherimide (PEI)

From Wikipedia, the free encyclopedia

This article is uncategorized.

Please help improve this article by adding it to one or more categories, so it may be associated with related articles (how?). Please remove this tag after categorizing.
This page has been tagged since October 2006.

Polyetherimide ( PEI ) is an amorphous, amber transparent, high performance thermoplastic with the characteristics common to PEEK. Relative to PEEK it is less temperature resistant, less expensive and lower in impact strength. It is prone to stress cracking in chlorinated solvents. It is avialble in market under the tradename Ultem, which is a registered trademark of General Electric, the principle developer and manufacturer.

Glass transition temperature: 216°C

Amorphous density at 25°C: 1.27 g/cc

Repeat unit: C₃₇H₂₄O₆N₂

Molecular weight of repeat unit: 592 g/mol

Polyetherimide Repeat Unit: 2D