Neutron shielding of EPDM rubber with boric acid: Mechanical, thermal properties and neutron absorption tests

Özdemir, Tonguç; Akbay, İsmail Kutlugün; Uzun, Hafize; Reyhancan, İskender Atilla

doi:10.1016/j.pnucene.2016.02.007

Cited by 85 publications

(39 citation statements)

References 18 publications

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“…Vulcanized EPDM is a thermoset elastomer and it can be used in a variety of applications like radiator hoses, wire cables, door seals, heat pipes, air conditioning, tubbing, belts, roofing system, and so on . Moreover, with its high filler capacity, it can be used for high‐tech radiation shielding when filled with functional materials …”

Section: Introductionmentioning

confidence: 99%

Using fish scales (Sardina pilchardus) within ethylene‐propylene‐diene ter monomer rubber as bio‐based filler

Akbay

Güngör

Özdemir

2018

J of Applied Polymer Sci

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Proper management of waste bio‐based materials is an important subject to protect the environment in a sustainable manner. In this study, ethylene‐propylene‐diene monomer (EPDM) composites with different fish scale content were prepared and properties of these composites were investigated. Mechanical tests, gel content, curing, and thermal properties were analyzed. In addition, rheological and morphological analyses were also carried out. It was seen that EPDM rubber and fish scale composite have a good compatibility. The addition of fish scale improved the mechanical properties of the final material. Moreover, an increase in gel content and in swelling ratio was obtained for the composite samples containing fish scale. Moving die rheometer tests are concluded that fish scale has acted like an agent that improves the vulcanization process. Thermal gravimetric analysis result pointed out that the thermal stability of the composite developed is higher than neat EPDM. It was concluded that 40 phr fish scale content gives best results. The kinetic study demonstrated that fish scale is compatible with the matrix and improves the vulcanization process. The results have shown that using the fish scale as a bio‐based filler is a facile and green way to accommodate the bio‐based wastes. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46698.

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Section: Introductionmentioning

confidence: 99%

Using fish scales (Sardina pilchardus) within ethylene‐propylene‐diene ter monomer rubber as bio‐based filler

Akbay

Güngör

Özdemir

2018

J of Applied Polymer Sci

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“…Shielding that is one-layer [48][49][50][51] or multilayer [52][53][54] can be used for this purpose. In most cases, fast neutron shielding consists of two or three components which first slows fast neutrons to thermal energy (moderator), absorbs thermal neutrons (absorber), and then attenuates the gamma rays which are produced by different neutrons-nuclei interactions in the moderator and absorber (attenuator).…”

Section: Shielding and Construction Materialsmentioning

confidence: 99%

Neutron-Stimulated Gamma Ray Analysis of Soil

Kavetskiy¹,

Yakubova²,

Torbert³

2017

New Insights on Gamma Rays

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This chapter describes technical aspects of neutron-stimulated gamma ray analysis of soil carbon. The introduction covers general principles, different modifications of neutron-gamma analysis, measurement system configuration, and advantages of this method for soil carbon analysis. Problems with neutron-gamma technology in soil carbon analysis and methods of investigations including Monte-Carlo simulation of neutron interaction with soil elements are discussed further. Based on the investigation results, a method of extracting the "soil carbon net peak" from the raw acquired data was developed. The direct proportional dependency between the carbon net peak area and average carbon weight percent in the upper 10 cm soil layer for any carbon depth profile was shown. Calibration of the measurement system using sand-carbon pits and field measurements of soil carbon are described. Measurement results compared to chemical analysis (dry combustion) data demonstrated good agreement between the two methods. Thus, neutron-stimulated gamma ray analysis can be used for in situ determination of near-surface soil carbon content and is applicable for precision geospatial mapping of soil carbon.

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“…They are usually incorporated into the elastomers to improve the neutron shielding capacity. [17][18][19][20] The incorporation of the neutron absorber fillers into the rubber matrix can alter the thermal and viscoelastic behavior of composites. Boric acid (H 3 BO 3 ) (BA) is a weak acid, also known as monobasic Lewis boron acid with a layered structure and a melting point of 170.9 C. [21] The molecular structure of BA allows it to act as an effective solid lubricating agent.…”

Section: Introductionmentioning

confidence: 99%

“…[22] The economical and environmentally friendly nature of the BA together with neutron absorption cross section has made it possible for researchers to select as a neutron-absorbing compound in rubber composites. [8,9,18] Borax (sodium tetraborate decahydrate) (BO) is another cost-effective and widely reported boron-containing compound used for neutron shielding applications. [23,24] The molecular weight of the BO compound is much higher than BA and it possesses octahedral structure, unlike the layered form of BA.…”

Section: Introductionmentioning

confidence: 99%

Viscoelastic and thermal properties of naturalrubber low‐density polyethylene composites with boric acid and borax

Abdulrahman

Ahmad

Thomas

et al. 2020

J of Applied Polymer Sci

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The influence of boric acid (BA) and borax (BO) neutron‐absorbing fillers on thermal stability and viscoelastic behavior of natural rubber (NR) low‐density polyethylene composites has been studied. The thermal degradation and dynamic mechanical properties of the composites have been analyzed as a function of temperature. The results revealed the enhancement of thermal stability of the composites by the addition of BA and BO fillers. The flame resistance of the material was improved by the addition of both the fillers. The storage modulus was found to be dependent upon the temperature and nature of the filler. The amount of NR chains immobilized by filler particles has been quantified from dynamic mechanical analysis and secondary filler/filler interactions have been verified by the Payne effect analysis. Finally, the experimental results have been compared with theoretical predictions.

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Neutron shielding of EPDM rubber with boric acid: Mechanical, thermal properties and neutron absorption tests

Cited by 85 publications

References 18 publications

Using fish scales (Sardina pilchardus) within ethylene‐propylene‐diene ter monomer rubber as bio‐based filler

Using fish scales (Sardina pilchardus) within ethylene‐propylene‐diene ter monomer rubber as bio‐based filler

Neutron-Stimulated Gamma Ray Analysis of Soil

Viscoelastic and thermal properties of naturalrubber low‐density polyethylene composites with boric acid and borax

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