Morphology and properties of Nylon6/ poly (butylene terephthalate) in situ microfibrillar reinforced blends: influence of blend ratio

Microfibrillar reinforced composite (MFCs) have been prepared by reactive melt-extrusion of Nylon6 and Poly (butylene terephthalate) in different blend ratio. These composites have been generated by a series of process, which include reactive extrusion in a twin-screw extruder, followed by melt spinning and drawing (nanofibrillation). These composites have been investigated by differential scanning calorimetry (DSC), X-ray diffraction (XRD), Scanning electron microscopy (SEM) and mechanical testing. The microstructure of blend as revealed by SEM, showed fine dispersion of minor phase and PBT fibrils in PA6 matrix.This enhanced fibrillation of PBT was attributed to Polar-polar interactions of amid-ester group as modifier to improve interfacial adhesion of phases and fibrillation. This improvement in structure altered mechanical properties by transferring stress between matrix and PBTnanofibril reinforcement.