A polymeric blend nanocomposites were prepared using mixer of Epoxy and polysulfide rubber [EP+PSR] as a matrix material and the Zirconium Oxide Nano-powder ZrO2 as a reinforcement material, in different particle sizes and same adding ratio of 2% wt . Hand Lay-up molding method was used to prepare the samples. Impact strength, compression resistance and thermal conductivity tests, were carried out for the polymeric blend and composites samples before and after immersion in tap water. The results showed that adding Nano zirconia powder to the polymer blend improved the mechanical properties, while the thermal conductivity of the polymer blend was higher than that of the composites. Also, it was observed that water immersion caused a decrease in impact strength, compression resistance, modulus of elasticity and thermal conductivity in a manner proportional to the immersion time.

This research studies is the effects of the chemical solutions on the structural properties and thermal conductivity of the nanocomposite materials. Samples were prepared via the hand lay-up molding method, using epoxy resin as a matrix and a variety of weight ratios of the nanoceramic powder (Zirconia- Yttria) as a reinforcement material with different weight ratios,using hand lay-up molding method. Distilled water H20 and diluted HCl and Na0H solutions were used as immersion mediums. Surface roughness, granularity cumulating distribution and thermal conductivity were investigated. The results showed an increase in the surface roughness and changes in the granularity cumulating distribution and thermal conductivity that were dependent on the type of immersion medium used, as well as on the addition ratio of Zirconia-Yttria.

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The aim of this research is to study the affecting factors on the dielectric strength of polymeric blend [of Epoxy resin and unsaturated polyester] and its composites. A Nano composites were prepared based on polymeric blend ( 80% Ep + 20% UPE), supported by Nano Piezoelectric powder (PZT), of crystalline size (1-10 nm) with weight percentages (2, 4 and 6 Wt%). Dielectric strength (E br ) for the blend and composite samples was studied before and after immersion in water for 11 weeks. The results showed that (E br ) decreases with average the rise of voltage decreasing, increasing the thickness of samples and by form nonlinearly (35.13 kv/s -19.38 kV/s), and with the number of cycles While (E br ) increases with increasing the addition of ratio (36.77 kV/s -43.82 kV/s ). On the other hand, immersing the samples in the water caused a clear reduction of the dielectric strength for each of the blend and composites.