Issue 37

P. Velev et alii, Frattura ed Integrità Strutturale, 37 (2016) 272-279; DOI: 10.3221/IGF-ESIS.37.36 275 0 50 100 150 200 250 0 3 6 9 12 15 t, min T аd , o C 0.3 g 0.4 g 0.5 g 0.6 g 0.7 g Figure 3: Changes of adiabatic temperatures with the time depending on the initiator concentration. Figure 4: Average hydrodynamic diameter and particles size distribution of aqueous solution of γFe 2 O 3 nanoparticles. The observed broader polydispersity of the nanoparticles could be due to some nanoparticles aggregation. Further, different amounts of filler are added to the water alkaline solution of the resin thus obtaining following composites which are tested for their mechanical properties such as tensile, impact and flexural strength (Tab. 1). № UPER. g Hydrosol of nanoparticles. ml Water. ml Content of magnetic nanoparticles. % 1 50 0 26 0 2 50 5.25 20.75 0.1 3 50 15.75 10.25 0.3 4 50 26 0 0.5 Table 1: Content of the used magnetic composites The tensile strength (Fig. 5) decreases slightly with increasing the amount of magnetic nanoparticles in the resin as the obtained data are not significantly changed depending on the magnetic nanoparticles content.