Abstract
Binary and ternary blends of epoxy resin (EP) and unsaturated polyester (UPE) with different weight fractions (0, 3, 5, 7, 10 and 20%) percentages of RTV silicone rubber (SR) were prepared by two different methods. Before that the silicone rubber (SR) was mixed well with sufficient amount of ethanol in one method, and without ethanol in the other method. It was found that the binary and ternary blends specimens that prepared with ethanol was chosen as the best samples have the highest experimental results of impact strength and a good homogeneous dispersion of silicon rubber in the resins as compared with the blends samples that prepared (without ethanol), which were selected to evaluate the lower mixing ratio (LMR) of these blends. The blends with (LMR) were selected and they are going to be considered as a matrix for the nano composite material to be reinforced by Al with 1% wt, and Al2O3 with 1% wt nanoparticles to develop the properties of (LMR) blends. Impact test was carried out on the blends with (LMR) and their nanocomposites at different environmental conditions before and after immersion in water for 4 weeks. Also hardness (shore D) test was carried out on the blends with (LMR) and their nanocomposites. The best results of this study befor imarsion in water were achieved with the nanocomposite material consisting of (LMR) binary blend reinforced with Al and (LMR) binary blend reinforced with Al2O3 nanoparticles. The results showed that after immersion period of 4 weeks, a decrease in the values of impact strength was observed for the samples of (LMR) binary and ternary blends without reinforcement. It also can be noted that impact strength was increased for the binary blends reinforcement with Al and Al2O3 nano particles after 4 weeks of immersion in water. Whereas it can be seen that ternary blends reinforcement with Al and Al2O3 nano particles would not achieve similar enhanced in impact strength as that of binary blends reinforcement with Al and Al2O3 nano particles after immersion in water.
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