3. Results and discussion
3.1. Characterization of the nanomaterial in the polymer The TEM images of the polymeric films LDPE A and LDPE C showed that the TiN nanoparticles were distributed homogeneously in the polymers, what could be expected from the compounding and extrusion process of the polymeric films. At higher magnification it could be visualized that TiN exists as aggregates with nanoscale dimensions (Fig. 1). The TEM measurements showed that the aggregates consist of almost spherical primary particles with an average size of 20 nm. However, these particles were not found isolated in any of the examined TEM images, but fused to irregular formed aggregates of an average size of 100–500 nm. It can be
assumed that the test film LDPE B has the same size
characteristics than the other two test films.