Temperature and LET effects on radiation-induced modifications in non-perfect polyethylenes

Furtak-Wrona, K.; Cornaton, M.; Durand, D.; Dauvois, V.; Roujou, J.L.; Esnouf, S.; Ferry, M.

doi:10.1016/j.polymdegradstab.2019.02.002

Cited by 5 publications

(7 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, hydrogen can lead to the hydrogen brittleness of metal and defect generation in the semiconductor. , The gas products and derived radicals due to γ radiation could also influence the chemical reactions. , The gaseous molecules can also engender the decrease in vacuum degree, leading to the increased rotational resistance of the electrical motor. Additionally, the accumulation of combustible gas is very dangerous due to the explosive risk . Therefore, it is practically significant to identify and control the radiation-induced gas formation.…”

Section: Introductionmentioning

confidence: 99%

Gamma Radiation Chemistry of Polydimethylsiloxane Foam in Radiation-Thermal Environments: Experiments and Simulations

Liu

Huang

Liu

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The γ radiolysis behavior of polydimethylsiloxane (PDMS) in the radiation-thermal environments (dose rate, 0.2 Gy/s) is studied to pinpoint the basic knowledge of the temperature (20–70 °C) effects. The non-monotonous temperature effects on the formation of gas products, paramagnetic species in silica, and cross-linking density are proposed to correlate with the complex chemical reaction mechanisms. Besides, molecular dynamics simulation and theoretical calculation are first performed simultaneously based on the radical chemistry and intricate material composition, making it easier to comprehend and further harness the radiolysis mechanisms and structure deterioration of PDMS. The γ radiation-induced primary gas products and dominant cross-linking phenomena are reproduced by the molecular dynamics simulations with a reactive force field, and the reaction mechanisms and physicochemical interactions among PDMS chains, gas products, reactive radicals, and silica fillers are thoroughly studied at the atomic scale. The thermochemistry of the barrierless radical coupling reactions and reactions with explicit high-barrier transition states is calculated at the M06-2X theoretical level with the 6-311g(d, p) basis set. The barrierless reactions are all exothermal with the heat release of 321–618 kJ/mol, while the potential barriers for reactions with explicit transition states vary between 37 and 229 kJ/mol. The results show that γ radiation-induced radicals are crucial for the ensuing gas formation and cross-linking reactions, especially for the radical coupling reactions. The radical chemistry involved in the radiolytic PDMS is the key to understand and simulate its radiolysis behavior, according to the experimental and simulated results.

show abstract

Section: Introductionmentioning

confidence: 99%

Gamma Radiation Chemistry of Polydimethylsiloxane Foam in Radiation-Thermal Environments: Experiments and Simulations

Liu

Huang

Liu

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…PMMA and polyurethanes present a similar and intermediate behaviour. This is explained by the presence of carbonyl bonds in their structure which are well known to be very efficient as regard to the energy transfer * , under photolysis [30], under low LET irradiation [1] as under high LET irradiation [7]. Hydrogen release decrease is correlated to the presence of these C=O bonds which are present in an aliphatic chain; corollary being this carbonyl bond degradation.…”

Section: Resultsmentioning

confidence: 99%

“…Some additives were identified in the polymer using Atmospheric Solids Analysis Probe -Mass Spectrometry (ASAP-MS): palmitic and stearic acids which are known to be used as lubricant and antiadhesive, Irgafos 168 and Irganox 1076 known to be used as antioxidant. An analysis of the sample by FTIR has not evidenced any defect at the molecular level [7].…”

Section: Polyethylenes (Pe)mentioning

confidence: 89%

“…Its crystallinity and its melting temperature were determined using DSC (differential scanning calorimetry) and are respectively χ ≃ 65 % and Tm ≃ 130°C. An analysis of the sample by Fourier transform infrared spectroscopy (FTIR) has evidenced a low concentration of vinyl bonds in the polymer backbone [7].…”

Section: Polyethylenes (Pe)mentioning

confidence: 99%

“…To model the contact of organic materials with radionuclides, irradiations of simulation have to be carried out. It allows a better understanding of the degradation mechanisms of polymers as a function of the emitter (thus the type of irradiation), the atmosphere during irradiation, the dose and the dose rate [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of oxygen on gas emitted from polymer irradiated using Swift Heavy Ion beams

Ferry

Esnouf

Leprêtre

et al. 2021

Nuclear Instruments and Methods in Physics Research Section B:

Self Cite

View full text Add to dashboard Cite

Preparation of oxidized polyethylene wax from polyethylene wax by SCCO2-assisted foam method: structural characteristics, reaction mechanism and properties

Qiao,

Gao,

Qian

et al. 2024

J Polym Res

View full text Add to dashboard Cite

Temperature and LET effects on radiation-induced modifications in non-perfect polyethylenes

Cited by 5 publications

References 27 publications

Gamma Radiation Chemistry of Polydimethylsiloxane Foam in Radiation-Thermal Environments: Experiments and Simulations

Gamma Radiation Chemistry of Polydimethylsiloxane Foam in Radiation-Thermal Environments: Experiments and Simulations

Effect of oxygen on gas emitted from polymer irradiated using Swift Heavy Ion beams

Preparation of oxidized polyethylene wax from polyethylene wax by SCCO2-assisted foam method: structural characteristics, reaction mechanism and properties

Contact Info

Product

Resources

About