Preparation of PE/PP Blends with Microfibrillar-Phase Morphology

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Proceedings of the 6th IASME/WSEAS International Conference on Heat Transfer, Thermal Engineering and Environment (HTE'08), Pts I and II, Page: 511-515

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Polášková, Martina; Čermák, Roman; Sedláček, Tomáš; Obadal, Martin; Sáha, Petr
World Scientific and Engineering Academy and Society (WSEAS)
Biocompatible polymer blend; Polyethylene; Polypropylene; In-situ composite; Microfibrillar-phase morphology
conference paper description
Polyethylene/polypropylene blend extrudates with microfibrillar-phase morphology (polypropylene microfibrils reinforcing polyethylene matrix phase) were prepared through continuous extrusion with semihyperbolic-converging die enabling elongation and orientation of macromolecules in flow direction. Structure and thermal properties of extruded profiles were examined using electron microscopy, wide-angle X-ray scattering and differential scanning calorimetry. Tensile tests proved that extrudates with microfibrillar-phase morphology show significantly. higher mechanical properties than conventional extrudates. Presented concept offers possibility of expensive multicomponent medical devices with metal-inlays replacement.