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- 저자 : Eker Aysegul Akdogan (검색결과 2 건)
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Neutron shielding characteristics of polymer composites with boron carbide
Tuna Tuncay,Eker Aysegul Akdogan,Kam Erol 한국물리학회 2021 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.78 No.7
In this study, the neutron shielding capabilities of boron carbide ( B4C)-reinforced polyester-matrix composite materials were investigated. For the study, 20- 40- and 60-mm-thick specimens were first prepared by reinforcing with 10–50% B4C, and later their neutron shielding characteristics were studied by using various characterization techniques. The shielding capability of the composite materials was observed to increase with specimen thickness. In addition, increased amounts of B4C reinforcement improved the attenuation ratio of the material thereby increasing the shielding effectiveness. This trend, however, changed when the B4C ratio reached 40% and 50% at which a gradual decrease in neutron attenuation was observed. The experimental setup was also simulated using the Monte Carlo code MCNP-5, and similar computations were carried out. The experimental data almost completely agreed with computational results.
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Ali Avci,Aysegul Akdogan Eker,Mehmet Safa Bodur 한국고분자학회 2022 폴리머 Vol.46 No.5
The purpose of the study is to investigate the influences of internal lubricant and maleic anhydride (MA) on tensile, flexural, toughness properties and thermal properties of brittle biopolymer polylactic (PLA), in order to consider PLA forautomotive applications as a matrix material. For this aim, polylactic acid and thermoplastic polyurethane (TPU) werecompounded to overcome the inherent brittleness of PLA. Three different compound types, namely PLA/TPU, PLA/MA/TPU and PLA/MA/TPU/internal lubricant, were prepared by extrusion and injection processes. The influence of the internal lubricant and the coupling agent on the compounds was examined in terms of the thermal, mechanical and thermomechanical properties of the compounds. The results show that the internal lubricant could be also incorporated into PLA/TPU compounds to enhance the elongation at the break by about 16% and to improve the storage modulus of the compounds. The compatibilizer showed a significant improvement in the thermal, thermo-mechanical and mechanical properties of the compounds.
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