PEEK and Temperature: Your Top FAQs Answered!

In the realm of high-performance polymers, few materials command as much attention as polyetheretherketone, commonly known as PEEK. Renowned for its exceptional mechanical properties and chemical resistance, PEEK stands out as a versatile solution in numerous industries. However, one of its most remarkable attributes lies in its ability to withstand elevated temperatures without compromising its integrity. In this comprehensive FAQ guide, we delve into the intricacies of PEEK's response to temperature variations, addressing common questions and shedding light on its thermal behavior in diverse applications. Whether you're an engineer seeking to optimize designs for extreme environments or a researcher exploring the frontiers of material science, join us as we unravel the mysteries of PEEK's performance in the face of heat.

PEEK Temperature Range

PEEK has a glass transition temperature of around 143 °C (289 °F) and melts around 343 °C (662 °F). Some grades have a useful operating temperature of up to 250 °C (482 °F) . It is highly resistant to thermal degradation as well as attack by both organic and aqueous environments.

What is the lowest temperature for PEEK?

PEEK's low service temperature extends down to at least −70 °C (−94 °F). Like most plastics, at extremely low temperatures, PEEK exhibits increased brittleness. 

What is the transition temperature of PEEK?

PEEK is a semi-crystalline polymer, whose glass transition temperature is 143 °C and melting temperature is 343 °C.

Is PEEK a good thermal insulator?

PEEK is a thermal isolator, so it does not readily conduct heat into nearby materials. It's also an ideal electrical isolator, and together, these properties make it useful in several medical applications.

What temp does PEEK degrade?

Major PEEK Degradation Products at 450°C. At temperatures above 650°C, chain cleavage at terminal carbonyls is believed to be the primary pyrolysis pathway. Phenol has been identified as a major decomposition product, its yield being greater than benzene at temperatures above 650°C.

Is PEEK a thermoplastic or thermoset?

Polyetheretherketone (PEEK) is a semi-crystalline thermoplastic with excellent mechanical and chemical properties. In addition to resistance to chemicals, radiation, water absorption, and wear, it offers thermal stability in temperatures up to 480° F.

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