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The epoxies are usually heavy and viscous materials with a molecular weight of approximately 370, with a wpe (weight per epoxide group) of about 180 and a viscosity of 1100 to 1500 mPa-s at 25°C. - 2 - Several factors affect the behaviour of epoxies subjected to ionizing radiations, including the radiation environment and the presence of additives.
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Thermomechanical curves of epoxy resin exposed to Co60 gamma rays, vacuum: 1 - non-irradiated; 2 - 0.5 MGy; 3 - 3 MGy; 4 - 5 MGy. Crosslinking occurs via a radical mechanism because the yields of radicals and gaseous products are comparable [ 14]. A radical yie ld in epoxy oligomer E-41during radiation exposure
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A comprehensive investigation on the effect of gamma radiation on epoxy-lead oxide composites has been carried out highlighting upon the chemical structure, thermal stability, mechanical stability, surface morphology and gamma attenuation properties.
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Numerous studies are reporting the use of polymer composites as gamma-radiation shields. Different barite concentrations 0%, 10%, 20%, 30%, 40%, and 50% were added to epoxy, and the linear attenuation coefficients of the composites increased with the increase in barite concentrations (Al-Sarray et al. 2017 ).
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By Richard Thompson. Scientists in China have designed and developed a series of epoxy thermoset resins containing gamma ray-responsive bonds. The new polymers, which have mechanical.
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Peak Epoxy LLC, Cary, North Carolina. 475 likes · 1 was here. Peak Epoxy is a residential and commercial epoxy flooring company. We specialize in floor coatings.
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Herein, carbon-doped boron nitride (BCN), modified by two silane coupling agents, was used to fabricate epoxy composites, and the effect of gamma irradiation on the properties of epoxy resin composites was investigated. The research showed that the modified BCN/epoxy composites prepared herein exhibited excellent mechanical and thermal.
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Epoxy resins are a good candidate for radiation shields owing to their low cost, high strength, low toxicity, resistance to corrosion, excellent mechanical properties, and low shrinkage. [ 9, 10, 11] These characteristics make epoxy composites a desirable shield to attenuate neutrons, X-rays, and gamma rays.
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The gamma irradiation treatment of epoxy resins composites offers many advantages compared with conventional thermal curing, such as a reduced time, ambient temperature, greater flexibility [5], changes in physical, optical, electrical properties, or morphological structure [2,9,10]. Often, epoxy resins are amorphous in nature and it is.
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The proposed epoxy nanocomposites are established to be useful for the development of improved γ -radiation shielding. Introduction Lately, the applications of γ -rays are ever-increasing in the fields of nuclear physics, medicines, dosimetry, biology, agriculture and industries (Damla et al., 2012a).
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We have attempted to develop the gamma radiation shielding abilities of newly prepared epoxy composites by introducing ZrO2. The radiation shielding parameters are experimentally reported below. The experimental setup included an HPGe detector and different radioactive point sources which emitted photons with energies of 0.06, 0.662, 1.173, and 1.333 MeV. The gamma radiation shielding.
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We developed new composites for photons shielding applications. The composite were prepared with epoxy resin, red clay and bismuth oxide nanoparticles (Bi2O3 NPs). In order to establish which.
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The aim of the current study is to investigate the impact of introducing micro- and nanoparticle MgO as a filler into epoxy resin on the radiation shielding abilities of the prepared samples. To this end, we performed a gamma-radiation spectroscopy experiment with the help of an HPGe detector and Am-241, Cs-137, and Co-60 sources. We evaluated the particle size effect (PSE) and detected the.
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Malekie, S. & Hajiloo, N. Comparative study of micro and nano size WO3/E44 epoxy composite as gamma radiation shielding using MCNP and experiment. Chin. Phys. Lett. 34(10), 108102 (2017).
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Epoxy •••• L Phenolics •••• Includes the addition of mineral fillers. L Polyester, unsaturated •••• Includes the addition of mineral or glass fibers.. and more than 90 years of deep expertise across Gamma, EO, E-Beam and X-ray sterilization. Our operations span 47 facilities in 13 countries to ensure we are