TWB 02/16 Rezyklierbarkeit von PP mit Sauerstoff-Absorbern
Versuche zum Einfluss der Temperatur und zur Anzahl der ExtrusionenAn often used oxygen scavenger is a blend of iron powder and additives dispersed in a polypropylene carrier matrix. Not much is known about the influence of multiple extrusions of these
materials on polypropylene properties, film properties and process stability. Therefore the aim of this study was to assess these issues. Polymer degradation was evaluated by different means of measurement: MFR and oxygen absorption. The results indicate that polypropylene and polypropylene with dispersed oxygen scavenger degrade by the impact of extrusion which can be seen by increased MFR. The more often the material is extruded the more intense is the degradation. Overall the iron based oxygen scavenger has a lower impact on degradation than the temperature and the number of extrusions.
Keywords: oxygen scavenger, recycling
Schlagworte: Sauerstoff-Absorber, Recycling, Rezyklierung