Overview of Polyimide (PI)

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Overview of Polyimide (PI)

Overview of Polyimide (PI) including background, history, advantages, limitations and typical applications.
Background: The first commercial polyimides (PIs) were introduced by DuPont in the early 1960s. Because of the processing difficulties the availability of modified polyimides was established in the 1970s.

PI Generics

- PI, TP
- API
- PAI

Typical PI Applications

- Seals
- Bushings
- Thrust Washer
- Industrial Applications
- Aerospace Applications
- Bearings
- Electrical/Electronic Applications
- Sealing devices
- Gears

Advantages of PI

- Heat Resistance, High
- Chemical Resistance, Good
- Thermal Stability, Good
- Wear Resistance, Good
- Toughness, Good
- Amorphous
- Strength, Good
- Adhesion, Good
- Stiffness, Good

Disadvantages of PI

- Difficult to process, high temperatures required
- Limited resistance to hydrolysis
- High costs

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