Molding Process
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PPS discoloration (browning)
Problembeschreibung
During PPS processing, the color changes from natural light yellow to dark brown or black.
Ursachenanalyse
Excessive processing temperature or too long residence time causes PPS oxidative crosslinking and browning.
Lösung
Strictly control temperature <340°C; shorten residence time; use nitrogen protection when necessary.
Wichtigste Erkenntnis
The root cause of PPS discoloration from over-processing lies in oxidation.
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