Possible use of EPDM in radioactive waste disposal: Long term low dose rate and short term high dose rate irradiation in aquatic and atmospheric environment

Hacıoğlu, Fırat; Özdemir, Tonguç; Çavdar, Seda; Usanmaz, Ali

doi:10.1016/j.radphyschem.2012.10.011

Cited by 24 publications

(4 citation statements)

References 32 publications

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“…Adsorption of radioactive species onto economy and easy to dispose materials has attracted attention of several scientists. Hacıoğlu and co-workers proposed ethylene propylene diene terpolymer (EPDM) to be relatively radiation resistant and a candidate polymer for usage in radioactive waste management [9]. Pyrolysis residues, bentonite and fly ash exhibited appreciable adsorption of radio antimony ( 122 Sb and 124 Sb) [10].…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites Based on Natural Biodegradable Materials: Effect of Post-Preparative γ-Irradiation on the Swelling Properties

Bajpai¹,

Tripathi²,

Saxena³

2014

OJOPM

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Nanocomposites were prepared by in situ intercalative polymerization of acrylamide/acrylic acid in presence of fuller's earth. Agro-and food industry wastes, sugarcane bagasse and chitin, respectively were used as reinforcing/ adsorbent materials. Effect of γ-radiation on adsorption characteristics of nanocomposites was evaluated by the comparison of swelling and erosion measurements of the exposed and unexposed samples. Low doses of γ-radiation improved the characteristics as adsorbents. Better results were obtained for the nanocomposites with polyacrylic acid matrix.

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Section: Introductionmentioning

confidence: 99%

Nanocomposites Based on Natural Biodegradable Materials: Effect of Post-Preparative γ-Irradiation on the Swelling Properties

Bajpai¹,

Tripathi²,

Saxena³

2014

OJOPM

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“…The peak at 3300 cm −1 was the stretching vibration peak of the hydroxyl group, which was attributed to the extended oxidation group of -OH (alcohol, hydroperoxide, and carboxylic acid) [ 28 ]. As a result of thermal-oxidative degradation, which content increased with increasing aging time.…”

Section: Resultsmentioning

confidence: 99%

Performance of Thermal-Oxidative Aging on the Structure and Properties of Ethylene Propylene Diene Monomer (EPDM) Vulcanizates

Chen

Song

et al. 2023

Polymers

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A thermal-oxidative aging test at 120 °C was conducted on ethylene propylene diene monomer (EPDM) vulcanizates of the semi-efficient vulcanization system. The effect of thermal-oxidative aging on EPDM vulcanizates was systematically studied by curing kinetics, aging coefficient, crosslinking density, macroscopic physical properties, contact angle, Fourier Transform Infrared Spectrometer (FTIR), Thermogravimetric analysis (TGA) and thermal decomposition kinetics. The results show that the content of hydroxyl and carbonyl groups as well as the carbonyl index increased with increasing aging time, indicating that EPDM vulcanizates were gradually oxidized and degraded. As a result, the EPDM vulcanized rubber chains were crosslinked with limited conformational transformation and weakened flexibility. The thermogravimetric analysis demonstrates that the thermal degradation of EPDM vulcanizates had competitive reactions of crosslinking and degradation, and the thermal decomposition curve can be divided into three stages; meanwhile, the thermal stability of EPDM vulcanizates gradually decreased with increasing aging time. The introduction of antioxidants in the system can promote the crosslinking speed and reduce the crosslinking density of EPDM vulcanizates while inhibiting the surface thermal and oxygen aging reaction. This was attributed to the fact that the antioxidant can reduce the thermal degradation reaction level, but it is not conducive to the formation of a perfect crosslinking network structure and reduces the activation energy of thermal degradation of the main chain.

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“…The infrared absorption peaks of the two EPDM vulcanizates at different wavelengths show the same change rule. The peak at 3300cm -1 was the stretching vibration peak of the hydroxyl group which is attributed to the extended oxidation group of -OH (alcohol, hydroperoxide and carboxylic acid) [24]. As a result of thermal oxidative degradation, which content increased with with increasing aging time.…”

Section: Fourier Transform Infrared Spectrometer (Ftir) Analysismentioning

confidence: 99%

Performance of Thermal-Oxidative Aging on the Structure and Properties of Ethylene Propylene Diene Monomer (EPDM) Vulcanizates

Quanchao¹,

Chen²,

Peiru³

et al. 2023

Preprint

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A thermal-oxidative aging test at 120°C was condutcted on Ethylene Propylene Diene Monomer (EPDM) vulcanizates of the semi-efficient vulcanization system. The effect of thermal-oxidative aging on EPDM vulcanizates was systematically studied by curing kinetics, aging coefficient, cross-linking density, macroscopic physical properties, contact angle, Fourier Transform Infrared Spectrometer (FTIR), Thermogravimetric analysis (TGA) and thermal decomposition kinetics. The results show that the content of hydroxyl and carbonyl groups as well as the carbonyl index increased with increasing aging time, indicating that EPDM vulcanizates are gradually oxidized and degraded. As a result, the EPDM vulcanized rubber chains were cross-linked, and its conformational transformation was limited and its flexibility was weakened. The thermogravimetric analysis demonstrates the thermal degradation of EPDM vulcanizates had competitive reactions of cross-linking and degradation, and the thermal decomposition curve can be divided into three stages, meanwhile the thermal stability of EPDM vulcanizates gradually decreases with the increase of aging time. The introduction of antioxidant in the system can promote the cross-linking speed and reduce the cross-linking density of EPDM vulcanizates, while inhibiting the surface thermal and oxygen aging reaction. This is attributed to the fact that the antioxidant can reduce the thermal degradation reaction level, but it is not conducive to the formation of a perfect crosslinking network structure and reduce the activation energy of thermal degradation of the main chain.

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Possible use of EPDM in radioactive waste disposal: Long term low dose rate and short term high dose rate irradiation in aquatic and atmospheric environment

Cited by 24 publications

References 32 publications

Nanocomposites Based on Natural Biodegradable Materials: Effect of Post-Preparative γ-Irradiation on the Swelling Properties

Nanocomposites Based on Natural Biodegradable Materials: Effect of Post-Preparative γ-Irradiation on the Swelling Properties

Performance of Thermal-Oxidative Aging on the Structure and Properties of Ethylene Propylene Diene Monomer (EPDM) Vulcanizates

Performance of Thermal-Oxidative Aging on the Structure and Properties of Ethylene Propylene Diene Monomer (EPDM) Vulcanizates

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