Molding Process
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PPS discoloration (browning)
Fenómeno del problema
During PPS processing, the color changes from natural light yellow to dark brown or black.
Análisis de la causa
Excessive processing temperature or too long residence time causes PPS oxidative crosslinking and browning.
Solución
Strictly control temperature <340°C; shorten residence time; use nitrogen protection when necessary.
Conclusión clave
The root cause of PPS discoloration from over-processing lies in oxidation.
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