Influence of γ -irradiation and temperature on the mechanical properties of EPDM cable insulation

Sarac, Tamara; Quiévy, Nicolas; Gusarov, A.; Konstantinović, M.J.

doi:10.1016/j.radphyschem.2016.03.024

Cited by 28 publications

(19 citation statements)

References 14 publications

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“…Values of D 50EB between 0.2 and 0.5 MGy can be deduced from Hanisch et al , who irradiated EPR cable‐sheathing materials using various dose rates and radiation sources. Šarac et al reported a D 50EB of about 0.6 MGy for EPDM‐based cable polymers irradiated with gamma radiation at several dose rates ranging from 106 to 1.39 kGy h −1 . In that work, the strain at break decrease was dependent neither on the dose rate nor on the temperature.…”

Section: Resultsmentioning

confidence: 99%

“…By contrast, oxygen stabilizes poly(methyl methacrylate) by decreasing the rate of main chain scission events. Oxidative degradation is controlled by the diffusion rate of oxygen through the polymer owing to the so‐called diffusion limited oxygen (DLO) effect At sufficiently high dose rates, the amount of oxygen consumed within the material is greater than that resupplied by diffusion from the surrounding atmosphere. Then oxidative degradation takes place near the air‐exposed surface but less or possibly no oxidation occurs deeper into the polymer.…”

Section: Introductionmentioning

confidence: 99%

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Degradation of EPDM and FPM elastomers irradiated at very high dose rates in mixed gamma and neutron fields

Ferrari

Pandini

Zenoni

et al. 2019

Polymer Engineering & Sci

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Elastomers are widely used in radioactive environments, where ionizing radiations induce a deterioration of their properties due to degradative phenomena occurring in the polymer structure. Their radiation resistance is usually assessed using γ‐rays and relatively low dose rates, but in actual applications, they are often exposed to mixed radiation fields and higher dose rates. Ethylene propylene diene monomer (EPDM) is known for its excellent resistance to γ‐rays but absorbs a larger dose by neutron interactions than fluoroelastomer (FPM). In this work, EPDM and FPM were irradiated in mixed neutron and gamma fields, using high dose rates (from 22 to 700 kGy h−1) and total absorbed doses between 0.2 and 3.5 MGy. The effects of irradiation were assessed by swelling tests, differential scanning calorimetry analysis and dynamic mechanical thermal analysis, and tensile tests. The results show that, even if irradiations were carried out in air, degradation took place under nonoxidative conditions owing to the high dose rates employed. Under such conditions, crosslinking is the dominant radiation‐induced reaction in both elastomers. Moreover, material degradation seems to be influenced mostly by the total absorbed dose and not by the type of radiation. Contrary to what observed at the lower dose rates employed with γ‐rays, major dose rate effects are not observed. POLYM. ENG. SCI., 59:2522–2532, 2019. © 2019 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Degradation of EPDM and FPM elastomers irradiated at very high dose rates in mixed gamma and neutron fields

Ferrari

Pandini

Zenoni

et al. 2019

Polymer Engineering & Sci

View full text Add to dashboard Cite

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“…With the will to build more power plant in the world, researchers are working deeply on the degradation of the constitutive materials in the nuclear plants. They work on the degradation mechanisms of insulation, materials composed of EVA (Ethylene Vinyl Acetate) and EPDM (Ethylene Propylene Diene Monomer) Šarac et al, 2016a. To go further, we looked at the first three most cited publications referring about the keywork nuclear (in the whole research i.e 1339 papers).…”

Section: Sources Usedmentioning

confidence: 99%

Mapping the scientific research on the gamma irradiated polymers degradation (1975–2018)

Girard‐Perier

Dorey²,

Marque

et al. 2020

Radiation Physics and Chemistry

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The global research trend on the degradation of gamma irradiated polymers from 1975 to 2018 was studied with a bibliometric approach. With 1339 papers published during this period, the investigation showed a growing interest overtime since 1975. The main countries working on that topic are USA, China, Japan and Europe. From 1975 to 1998, Japan was the first country to publish in this field. From 1998 to 2008, USA came on the top whereas from 2009 to 2018 China detained the most papers published. Networks analysis based on countries, authors and keywords showed interesting facts. First, a worldwide collaboration is growing overtime. Secondly, a multi-technique approach is necessary to study the degradation of the gamma irradiated polymers. Different work areas were highlighted. First, the journal sources study reveals three main domains: the nuclear, the biomedical and the polymer science domain. In a second time, the biology domain is the most discussed domain regarding at the top five most cited publications. Finally, the biopharmaceutical domain is the most represented domain regarding at the tip five most recent publications.

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“…Reports in the literature demonstrate that radiation treatment for polymers is employed to induce crosslinking of polymer chains, improving mechanical properties, or for the sterilization of medical devices [291][292][293][294][295]. The effects of radiation on polymers depend on the polymer chain and the energy absorbed after irradiation.…”

Section: Ionizing Radiationmentioning

confidence: 99%

Drug Micro-Carriers Based on Polymers and Their Sterilization

Costa¹,

Pereira²,

Silva³

et al. 2018

ChChT

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Influence of γ -irradiation and temperature on the mechanical properties of EPDM cable insulation

Cited by 28 publications

References 14 publications

Degradation of EPDM and FPM elastomers irradiated at very high dose rates in mixed gamma and neutron fields

Degradation of EPDM and FPM elastomers irradiated at very high dose rates in mixed gamma and neutron fields

Mapping the scientific research on the gamma irradiated polymers degradation (1975–2018)

Drug Micro-Carriers Based on Polymers and Their Sterilization

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