Polyamide 6 (PA6) /polyethylene terephthalate (PET) blends with gradient and encapsulation structure developed by injection molding

In this work, injection molded Polyamide 6 (PA6)/Polyethylene terephthalate (PET) blends with gradient and overall encapsulation structure were prepared, to which the migration and aggregation process of PET phase should be given credit. The main factors influencing the final morphology, including the viscosity ratio between the blending components and the injection velocity during injection molding, were discussed. It has been found that the final structure is greatly affected by the rheological properties of the blending components. In conclusion, under the fixed blending composition, the optimal gradient and encapsulation structure can be achieved in injection molded PA6/PET blends of D8501-20. Compared to pure PA6 injection sample and the other groups of injection samples, the chemical resistance of D8501-20 is remarkably improved. At the meantime, the mechanical properties of D8501-20 maintain a high value, which allows the PA6/PET injection product with this unique structure to have a considerable potential in industrial manufacturing.