Molding Process
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Incomplete thermal imidization
Problembeschreibung
The imidization degree of PI is lower than the target value and performance is substandard
Ursachenanalyse
Final heat treatment temperature not high enough or time insufficient; PAA film/product too thick, internal temperature uneven
Lösung
Ensure the final treatment temperature is ≥300°C and hold for a sufficient time; confirm the imidization characteristic peaks by IR spectroscopy (1780/1720/1380 cm⁻¹); control the sample thickness
Wichtigste Erkenntnis
The imidization degree (imidization rate) determines the final performance of PI
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