Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Epoxy

A Study of the Chemical Resistance and Hardness of Epoxy Reinforced by Magnesium Oxide and Charcoall Activated Particles

Nabil KadhimTaieh

Engineering and Technology Journal, 2016, Volume 34, Issue Issue 5 A, Pages 950-958

In this research, some samples from Epoxy with Magnesium oxide and charcoal activated Particles as filler in different weight percent (1, 3, and 6) wt. % have been prepared. Chemical resistance test has been done using simple immersion test in different periods of time and the immersion done in different solutions (1N NaOH, 1N HCL and 25 g of NaCl per litter of distilled water). Shore (A) hardness tests were carried out on the prepared samples before and after the immersion into distilled water, (1N HCl) acid, (1N NaOH) and 25 g of NaCl per litter of distilled water with normality (1). The results exhibited increase in chemical resistance and hardnessvalues increase with increasing magnesium oxide and charcoal activated ratio. The maximum hardness was observed in the case of epoxy -6wt% MgOcomposites i.e. 108.8 and least chemical resistance in the case of pure epoxy being 4.885% in NaOH.

Absorption coefficient measurement of bremsstrahlung radiation in nano composite

Noor M. Aowd; Hayder S.Hussain

Engineering and Technology Journal, 2015, Volume 33, Issue 7, Pages 1258-1266

In The present work has been prepare samples of polymer and the formation of composite material at different rates (20%, 50% &70%) of nano lead to clarify the difference in the spectrum absorption bremsstrahlung rays through the process of exponential equations graphic representation of the rate correction as a function of energy within the range (0.1 –1.7) MeV using NaI(Tl) energy selective scintillation counter with 90Sr/90Y negative beta source. It was getting also attenuation coefficient of the prepared samples to the same range of energy through graphic representation of natural allegartm count rate as a function of the thickness of absorbent material as the gradient relationship diagrams represents absorption coefficient. The result shows a directly relationship, between the thickness of the absorbent material and the absorption factor. The result, also show that, a reversal relationship, between the absorption factor and the energy of beta particle. The results shows that , the samples prepared of good absorption for beta particles and absorb bremsstrahlung rays and this efficiency is relatively unchanged according to the proportion of nano lead additives which shows a positive impact of the materials prepared in the process of radiation shielding.

Mechanical Properties for Polymer Hybrid Composites Reinforced by Fibers and Particles

Ruaa Haitham Abdel-Rahim

Engineering and Technology Journal, 2015, Volume 33, Issue 3, Pages 635-643

The Mechanical properties of hybrid composites based on epoxy resin (ER) filled with metal powders (Al) and Glass fibers (GF) are studied. The specimens are prepared using hand lay-up techniques according to ASTM standard for different volume fractions of fiber, particles& matrix material. Glass fibers (GF) are one of the most useful filler materials in composites, its major use being the manufacture of components in the aerospace, automotive, and leisure industries. The epoxy was reinforced with GF:( metal powders)in the ratio 10%:40%, 20%:30%, 30%:20%, and 40%:10%. It was observed that in the ratio 40%:10% has the maximum(UTS), fracture strength, flexural strength, fracture toughness and hardness increase with the increase of volume fraction of fibers when compared to unfilled epoxy.

Study of The Wear Rate of Some Polymer Materials In Different Conditions

Awham M. H; Sadeer M. M; Bushra H. M

Engineering and Technology Journal, 2010, Volume 28, Issue 16, Pages 5165-5170

The current investigation is interested by study of the wear phenomenon for two polymeric materials (Epoxy and Unsaturated polyester) resins, the prepared specimens were tested at room temperature by using two different loads(10,20)N for various testing times with different sliding distances. The resulted wear rates were calculated for each sample apart with. Variation the previous variables. To produce more precise idea about the wear characteristics of both above materials when immersed them in water environment, the study of wear rates was carried out for different immersion times at different temperatures when the above mentioned variables were fixed. It was found after comparing the results which obtained from the wear test in air that
Epoxy resin undergoes higher wear rates than unsaturated polyester resin in general with variation the testing parameters, while the results of immersion in water which acts as plasticizing factor for polymers exhibited different effect on the wear behavior of the materials under study.