Author/Authors :
al-ameery, aysser a. university of baghdad - institute of laser for postgraduate studies, Iraq , al-bawi, zainab f. university of baghdad - institute of laser for postgraduate studies, Iraq , hanna, waleed a.
Abstract :
In the present work, an epoxy / Al2O3 nanocomposite was prepared with weight fraction of (1, 1.5, 3 and 5)%. The fabrication process of nanocomposite is High-Shear mixing method followed by curing process at 80C°. The properties of the prepared Al2O3 nano filler epoxy base matrix composite was evaluated including testing some of mechanical properties (i.e., tensile, creep, impact, compression, bending, flexural, shear and wear), and some physical properties tests (i.e., thermal conductivity and dielectric constant). The Flexural strength, shear stress and thermal conductivity results showed that the maximum values where (912.17,20.7,0.4339) at Al2O3 addition of 1wt%.The obtained results for the elongation at break and Impact, compression strength appeared that the maximum values where (9.4,21.3,416.67) at Al2O3 addition of 1.5wt% While Tensile , bending young modulus ,wear rate and dielectric constant revealed that the optimum values where (13.314, 1732.09, 13, 50.377) at Al2O3 addition of 3wt% .The maximum Ultimate tensile strength (48.65)and least creep rate (0.000872) were achieved at Al2O3 addition of 5wt.% due to increasing the crosslink density and the chain flexibility of the cross linked polymer on the nanoparticles is restricted, Tg increases. The best results showed possible use of the system under severe mechanical and thermal conditions as well as being super insulator.
