Extrusion & Post
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Poor compatibility and delamination of PET modified material
Fenómeno del problema
Obvious delamination and poor mechanical properties when PET is blended with PE, PP and other polymers for modification.
Análisis de la causa
PET and non-polar polymers are thermodynamically incompatible with large interfacial tension, no compatibilizer used or insufficient dosage, improper mixing parameters.
Solución
Use suitable compatibilizers (SEBS-g-MAH, etc.); optimize mixing process (twin-screw, appropriate shear and temperature); control compatibilizer 3-8%.
Conclusión clave
The core of PET blend modification lies in improving interfacial compatibility.
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