Polyetherimides
“Polyetherimide (PEI)is an amorphous, amber-to-transparent thermoplastic with characteristics similar to the related plastic PEEK. Relative to PEEK, PEI is cheaper, but less temperature-resistant and lower in impact strength.” (Wikipedia, Polyetherimide, 5/9/2011)
Recent Journal Articles
Effect of high pressure carbon dioxide on the solubility and diffusivity of dichloromethane in polyetherimide
(p 2497-2501) Journal of Applied Polymer Science 114 #4 (2009)