Polyimide

Name:
Polyimide
Detailed information:
Any of a group of high polymers that have an imide group (—CONHCO—) in the polymer chain.

Properties:

Tensile strength 13,500 psi, d 1.42, water absorption 0.3% (24 h at 77K), heat distortion point above 260C, dielectric constant at 2000 mc 3.2, and coefficient of linear expansion 28.4 × 10−6 inch/inch/foot. High-temperature stability (up to 370C), excellent frictional characteristics, good wear resistance at high temperatures, resists radiation, exhibits low outgassing in high vacuum, resistant to organic materials at quite high temperatures, not resistant to strong alkalies and to long exposure to steam. Flame retardant.

Use:

High-temperature coatings, laminates and composites for aerospace vehicles, ablative materials, oil sealants and retainers, adhesives, semiconductors, valve seats, bearings, insulation for cables, printed circuits, magnetic tapes (high- and low-temperature-resistant), flame-resistant fibers, binders in abrasive wheels.