Molding Process
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Incomplete thermal imidization
Fenómeno del problema
The imidization degree of PI is lower than the target value and performance is substandard
Análisis de la causa
Final heat treatment temperature not high enough or time insufficient; PAA film/product too thick, internal temperature uneven
Solución
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
Conclusión clave
The imidization degree (imidization rate) determines the final performance of PI
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