Polyimides
For temperature stability up to 600 F
- Polyimides or polybenzimidazole (PBI) rather than epoxy
- Aerospace applications due to high cost
- Chemical Structure
- Polyimides
- Characterized by cyclic group containing a nitrogen and two carbonyl groups (C with double bond with oxygen)
- PBI
- Characterized by a five member ring containing two nitrogens and is attached to a benzene ring.
- Polyimids and PBI are structurally planar and very rigid. Large aromatic groups are added into polymer to make stiffer.
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