Temperature effects on the behavior of PET submitted to electron beam irradiation in a SEM

Elsafi, B.; Fakhfakh, S.; Fakhfakh, Z.; Jbara, O.

doi:10.1016/j.nimb.2011.08.016

Cited by 7 publications

(7 citation statements)

References 24 publications

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“…Furthermore, it can be seen also that σ s decreases with the temperature increases. This tendency fits well with other semi-crystalline polymers used in previous studies [ 28 , 29 ]. Generally, secondary electron emission depends on the sample’s specific crystalline state, particularly on the interaction of generated SEE with electrons, phonons, or crystalline defects [ 26 ].…”

Section: Discussionsupporting

confidence: 92%

“…The bulk discharge brings main part of trapped electrons to leave material surface in very short time leading to a fast decrease in the detrapping rate. In most studied materials [ 26 , 27 , 28 , 29 ], the detrapping rate decreases exponentially owing the influence current to take the same trends. Consequently, the influence current preserves moderate constant values for both temperatures, which means that detrapping process under high temperatures (below the melting peak) is constant.…”

Section: Resultsmentioning

confidence: 99%

“…The spreading of charge behavior monitored by the detrapping rate becomes superior to the charge retention one monitored by the trapping rate. Furthermore, increase in temperature leads to a decrease in effective trap energy [ 28 ]. The result is the occurrence of detrapping process even when electrons are injected by e-beam irradiation as we have observed in the presented results in Section 4.2.2 .…”

Section: Discussionmentioning

confidence: 99%

“…K is a calculable or measurable quantity [ 25 ] and is dependent on the sample geometry (thickness), sample properties (relative permittivity) and the electrical characteristics of the environment surrounding the sample. It was also found that this factor depends strongly on the applied temperature [ 27 , 28 , 29 ].…”

Section: Fundamental Aspectsmentioning

confidence: 99%

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Effect of Isothermal Conditions on the Charge Trapping/Detrapping Parameters in e-Beam Irradiated Thermally Aged XLPE Insulation in SEM

et al. 2022

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The effect of isothermal conditions on the trapping/detrapping process of charges in e-beam irradiated thermally aged XLPE insulation in scanning electron microscopy (SEM) has been investigated. Different isothermal conditions ranging from room temperature to 120 °C are applied on both unaged and aged XLPE samples (2 mm thick) by a suitable arrangement associated with SEM. For each applied test temperature, leakage, and influence currents have been measured simultaneously during and after e-beam irradiation. Experimental results show a big difference between the fresh and aged material regarding trapping and detrapping behavior. It has been pointed out that in the unaged material deep traps govern the process, whereas the shallow traps take part in the aged one. Almost all obtained results reveal that the trapped charge decreases and then increases as the temperature increases for the unaged sample. A deflection temperature corresponding to a minimum is observed at 50 °C. However, for the aged material, the maximum trapped charge decreases continuously with increasing temperature, and the material seems to trap fewer charges under e-beam irradiation at high temperature. Furthermore, thermal aging leads to the occurrence of detrapping process at high temperatures even under e-beam irradiation, which explains the decrease with time evolution of trapped charge during this period. The recorded leakage current increases with increasing temperature for both cases with pronounced values for aged material. The effect of temperature and thermal aging on electrostatic influence factor (K) and total secondary electron emission yield (σ) were also studied.

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Section: Discussionsupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Fundamental Aspectsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Isothermal Conditions on the Charge Trapping/Detrapping Parameters in e-Beam Irradiated Thermally Aged XLPE Insulation in SEM

et al. 2022

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“…Moreover, some other parameters, such as trapping center density, temperature and permittivity, will also affect polymer charging. [35][36][37] Further efforts could adopt this simulation method by taking more factors into account.…”

Section: Effect Of Electron Mobilitymentioning

confidence: 99%

Characteristics of charge and discharge of PMMA samples due to electron irradiation

Feng

Fang

et al. 2015

Chinese Phys. B

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Study of Nanocomposites Based on Organoclay‐Filled Polypropylene/Poly(Butylene Succinate) Blends With Improved Electrical Properties

Taktak,

Fakhfakh,

Jbara

et al. 2024

Journal of Polymer Science

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This study explores the behavior of the polypropylene/polybutylene succinate (PP*/PBS) polymer blend and its nanocomposites containing varying amounts of organically modified montmorillonite (OMMT) (Cloisite20: C20) (1%, 2%, 3%, 5%, and 10%) when subjected to electron beam irradiation in a scanning electron microscope (SEM). More specifically, we have studied the electrical properties of nanocomposites, in particular the trapping and transport of electrons in the material, as well as the emission of electrons. To examine the storage and spreading of injected electrical charge in nanocomposites under electron irradiation, we used time‐resolved current analysis method by measuring the induced currents (displacement and leakage currents). In order to verify whether there is a link between the electrical properties and the dispersion of the nanoclay particles in the polymer matrix, structural analyses were also carried out by x‐ray diffraction (XRD). The results revealed a significant increase in the equilibrium trapped charge as the amount of clay nanoparticles introduced into the matrix increased. This trend can be attributed to both an increase in the number of involved traps and the presence of interfaces that act as defect sites. This was checked by determining the energy distribution of the traps using Simmons' approach. Correlating the measured displacement and leakage currents allowed us to demonstrate that the presence of clay nanoparticles leads to a decrease in the electron emission efficiency.

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Temperature effects on the behavior of PET submitted to electron beam irradiation in a SEM

Cited by 7 publications

References 24 publications

Effect of Isothermal Conditions on the Charge Trapping/Detrapping Parameters in e-Beam Irradiated Thermally Aged XLPE Insulation in SEM

Effect of Isothermal Conditions on the Charge Trapping/Detrapping Parameters in e-Beam Irradiated Thermally Aged XLPE Insulation in SEM

Characteristics of charge and discharge of PMMA samples due to electron irradiation

Study of Nanocomposites Based on Organoclay‐Filled Polypropylene/Poly(Butylene Succinate) Blends With Improved Electrical Properties

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