Material Analysis
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Performance Decay of PEEK Under Long-Term Thermal Aging
Problem Phenomenon
After long-term high-temperature service, PEEK parts gradually decay in performance, with strength decreasing and color deepening, and early failure cases occur before reaching the design life.
Cause Analysis
Long-term thermo-oxidative aging causes molecular chains to slowly break and crosslink, and performance decays cumulatively over time; when the actual service temperature exceeds the material's long-term temperature resistance rating, decay accelerates; the processing degradation history shortens service life.
Solution
①Select materials according to the long-term temperature resistance rating and leave sufficient temperature margin; ②Control the processing heat history to reduce initial performance loss; ③Use accelerated aging tests to predict life; ④Establish service-period performance tracking for critical parts.
Key Takeaway
PEEK's long-term reliability depends on temperature margin and heat history management; every overheating in the processing stage is overdrawing the service life; accelerated aging data is the basis for design life.
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