Material Analysis
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Performance decline of PBT products in high-temperature and high-humidity environments
Problembeschreibung
The mechanical properties of PBT products decline significantly after aging in high temperature and high humidity (such as 85°C/85%RH).
Ursachenanalyse
PBT degrades (hydrolyzes) under hot and humid conditions, the molecular weight decreases and whitens, and glass fiber reinforced products degrade more severely due to interface damage.
Lösung
Add anti-hydrolysis agents; select hydrolysis-resistant PBT grades; consider sufficient performance margin in design.
Wichtigste Erkenntnis
PBT has limited hot and humid resistance and needs anti-hydrolysis stabilization.
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