Blends of ethylene-glycidyl methacrylate copolymer (PE-GMA) and polyamide 6 (PA6) were prepared in a corotating twin screw extruder. Two processing temperatures were used in order to disperse PA6 in two forms: at high temperature in the molten state in molted PE-GMA Matrix (emulsion type mixture) and at lower temperature as fillers in molted PEGMA matrix (suspension type mixture). Processed blends were analyzed by scanning electron microscopy and dynamic mechanical experiments to probe the reactivity in the extruder and the compatibilization phenomena. The dependence of the morphology and the rheological properties of PE-GMA/PA6 blends on blend composition and screw rotational speed was also investigated and is discussed in the paper. The results show that dispersion of the two polymers in the molten state leads to a higher level of interfacial reaction. They also show that whatever the screw rotational speed and the temperature of extrusion are, the rate of interfacial reaction in PE-GMA/PA6 blends is higher for 50/50 PE-GMA/PA blends than for 70/30 PE-GMA/PA blends.
The objective of the present work was to study the evolution of the morphology and rheological properties of PE/PS blends with different compositions.
Blends ranging from pure A to pure B component were prepared using a single-screw extruder to simulate a convenient industrial process. The analyses of the blend morphologies highlighted the poor adhesion between the two phases and revealed a direct dependence on their composition.
The observed variations in the rheological properties and morphology seem to be in agreement with the composition of the blends.
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