polyimide properties

Aromatic polyimides are derived from an aromatic dianhydride and diamine.
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Well Known Properties of Polyimides.

1. What is polyimide used for?
2. Is polyimide a thermoplastic?
3. Is polyimide a dielectric?
4. What is the difference between polyamide and polyimide?
5. Is Kapton a polyimide?
6. What are the typical sizes in polyimide sintering?
7. Is Kapton conductive?
8. What is vespel used for?
9. Why are thermosetting polymers preferred for some engineering products?
10. How is polyimide film made?
11. Which of the electric material can be used for higher temperature?

What is polyimide used for?

Polyimide is used for medical tubing, e.g. vascular catheters, for its burst pressure resistance combined with flexibility and chemical resistance. The semiconductor industry uses polyimide as a high-temperature adhesive; it is also used as a mechanical stress buffer.

Is polyimide a thermoplastic?

Because polyimide is a thermoset polymer it cannot be re-melted like thermoplastic, and is cured using heat, a chemical reaction, or irradiation as the driving energy force.

Is polyimide a dielectric?

Polyimides (PI's) have been widely used as dielectric and packaging materials in the microelectronics industry because of their unique physicochemical properties: excellent thermal stability, good radiation and chemical resistance, good mechanical strength, low moisture adsorption, and good adhesion to semiconductor ...

What is the difference between polyamide and polyimide?

The main difference between Polyimide and Polyamide is that the Polyimide is a polymer of imide monomers and Polyamide is a macromolecule with repeating units linked by amide bonds. Polyimide (sometimes abbreviated PI) is a polymer of imide monomers. ... Polyamides occur both naturally and artificially.

Is Kapton a polyimide?

In applications where superior adhesion and low shrinkage are important, Kapton® FPC is the polyimide film of choice. Kapton® FPC meets IPC 4202/1 requirements. DuPont ™ Kapton® HN general-purpose film has been used successfully in applications at temperatures as low as -269°C (-452°F) and as high as 400°C (752°F).

What are the typical sizes in polyimide sintering?

fairly narrow size distribution (the main fraction lies in the range of 6-15 μm).

Is Kapton conductive?

DuPont™ Kapton® RS is an electrically conductive polyimide film developed for heating applications where a thin, lightweight, uniform heater is needed. ... Due to its polyimide composition, it is resilient to high temperatures, thin, and highly flexible.

What is vespel used for?

Vespel is commonly used as a thermal conductivity reference material for testing thermal insulators, because of high reproducibility and consistency of its thermophysical properties. For example, it can withstand repeated heating up to 300 °C without altering its thermal and mechanical properties.

Why are thermosetting polymers preferred for some engineering products?

Thermosetting plastics are generally stronger than thermoplastic materials due to the three-dimensional network of bonds (crosslinking), and are also better suited to high-temperature applications up to the decomposition temperature since they keep their shape as strong covalent bonds between polymer chains cannot be ...

How is polyimide film made?

Polyimide film, the generic name of of DuPont's tradename Kapton®, is synthesized by polymerizing PMDA and ODA in strong polar solvents through the process of forming film and imine treatment at high temperature. ... It performs well in a wide range of temperatures as low as ‑452°F (-269°C) and as high as +500°F(+260°).

Which of the electric material can be used for higher temperature?

Polyimide (PI) was found to be the preferred choice for high-temperature dielectric films development due to its thermal stability, dielectric properties, and flexibility. However, it has disadvantages such as a relatively low dielectric permittivity.