Polipropileno/poliamida nahasteen konpatibilizazioa: azterketa morfologiko eta erreologikoa

Abstract

Polypropylene/Polyamide (PP/PA) blends have been prepared and the effect of adding compatibilizer copolymer and nanosilica to the blends has been studied. Microscopic analysis shows that the blends exhibit an emulsion-like morphology, with polypropylene as a continuous phase. The addition of a compatibilizer, as well as nanosilica particles, reduces significantly the size of PA droplets. When the binary blend is submitted to a continuous flow, coalescence of PA droplets may occur, which leads to an increase of the droplets. However, for the blends containing copolymer or nanosilica, the flow does not induce changes in the morphology. Oscillatory flows have been carried out to obtain viscoelastic properties of the different blends. In this work, it is proved that the relaxation spectrum obtained from viscoelastic results are able to detect morphological changes.