Effect of gamma irradiation on the optical properties of epoxy resin thin films

El-Rahman, Magda Abd; Yassien, Khaled M.; Yassene, Ali A. M.

doi:10.1016/j.ijleo.2018.12.182

Cited by 29 publications

(5 citation statements)

References 14 publications

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“…The optical behavior of

ε_{i}

in Figure 8B indicates higher energy incident photons are less probable to be resisted by the blends medium compared to the lower ones. Results represented here are compared with the literature as Magda et al 80 represented a behavior for

ε_{r}

and

ε_{i}

opposite to ours under the influence of different γ‐doses. They irradiated epoxy resin films and their showed a decrease for both dielectric constant values with the increase in gamma doses.…”

Section: Resultsmentioning

confidence: 64%

Investigation of structure and optical characteristics of irradiated PVP/CMC nanocomposite films based on ZnS/SnO₂ nanofillers

Abdel‐Kader,

Mohamed,

Almarashi

et al. 2023

Vinyl Additive Technology

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PVP/CMC/50%ZnS‐50%SnO2 blends were formed by solid state reaction, sol‐gel methods and casting technique. The structure and the crystallite size of the nanofillers (ZnS and SnO2) were examined using x‐ray diffraction technique (XRD). The effect of laser irradiation energies compared to the proportions of loaded nanofillers on the films internal structure and morphology was studied using XRD. The high miscibility among blends has been confirmed through Fourier transform infrared spectroscopy (FTIR). The energy dispersive x‐ray spectroscopy (EDS) analysis proved the presence of the nanocomposite polymer blends constituent atoms. The blends surface morphology has been investigated through scanning electron microscope (SEM). The dual effect of both different laser energies and oxygen atoms content simultaneously, on the linear and nonlinear optical parameters of nanocomposite films were explored as well. Results showed that, the laser irradiation energy process has the highest enhancement on the optical properties. The optical band gap (Eg) values were reduced from 4.8 eV (in the case of unirradiated blend) to 3.5 eV (for blends irradiated with 150 mJ/cm2) for allowed direct transitions, but for allowed indirect transitions Eg decreased from 3.3 eV (for unirradiated) to 2.2 eV (for irradiated with 150 mJ/cm2).Highlights A comparative discussion upon the effect of excess oxygen atoms has been represented. A dominant effect for the laser exposure compared to both the particle size and excess oxygen atoms. The variations of the nanocomposite films structural and optical features were promising.

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“…The optical behavior of

ε_{i}

ε_{r}

and

ε_{i}

opposite to ours under the influence of different γ‐doses. They irradiated epoxy resin films and their showed a decrease for both dielectric constant values with the increase in gamma doses.…”

Section: Resultsmentioning

confidence: 64%

Investigation of structure and optical characteristics of irradiated PVP/CMC nanocomposite films based on ZnS/SnO₂ nanofillers

Abdel‐Kader,

Mohamed,

Almarashi

et al. 2023

Vinyl Additive Technology

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“…The ε r is given by [45]: Wemple and DiDomenico connection [47] is used to estimate the single oscillator by:…”

Section: Resultsmentioning

confidence: 99%

Effect of low energy ion beam irradiation on the structural and optical properties of flexible PVA/CuO nano composite films

Altuijri,

Abdel-Hamid,

Ahmed

et al. 2024

Preprint

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The solution casting production process was used to synthesis the composite PVA/CuO that is consisting of copper oxide nanoparticle (CuONP) with polyvinyl alcohol (PVA) for use in optoelectronic. The PVA/CuO composite were then irradiated with argon fluences of 3x1017, 6x1017, and 9x1017 ions.cm− 2 by cold cathode ion source. The XRD, FTIR, and UV/Vis are employed to investigate the structural, functional group, and optical impacts of PVA/CuO. In addition, the dispersion properties of the investigated films were calculated using the Wemple and Di-Domenico method, which led to the determination of various optical parameters. Pure and irradiated films were estimated for their optical susceptibility and refractive index. At the fluence of 6x1017 ions.cm− 2, the single oscillator energy Eo rises from 3.25 eV for the un-irradiated film to 3.89 eV and the dispersion energy Ed rises from 0.098 eV to 0.26 eV. Therefore, the results reveal that irradiated PVA/CuO composite are more applicable for optoelectronics.

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“…partial decay of radicals occurs due to recombination and crosslinking instead of oxidation. The high-energy irradiation of epoxy resin systems highlights the improvement in the mechanical properties [68], thermal performances [54], optical characteristics [69], chemical constitution [37], or structural changes due to molecular fragmentation during γ-radiolysis [70]. All these modifications involve either the retention of radical on the surface of oxide particles or the structuration of further correlation of intermediates into larger molecular structures [71].…”

Section: Discussionmentioning

confidence: 99%

Stability Qualification of Resins/Metallic Oxide Composites for Surface Oxidative Protection

Zaharescu,

Mirea,

Borbath

et al. 2024

Polymers

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The accelerated degradation of alkyd resins via γ-irradiation is investigated using non-isothermal chemiluminescence. The stability qualification is possible through the comparison of emission intensities on a temperature range starting from 100 °C up to 250 °C under accelerated degradation caused by radiolysis scission. The measurements achieved in the samples of cured state resin modified by various inorganic oxides reveal the influence of metallic traces on the aging amplitude, when the thermal resistance increases as the irradiation dose is augmented. Even though the unirradiated samples present a prominent chemiluminescence intensity peak at 80 °C, the γ-processed specimens show less intense spectra under the pristine materials and the oxidation starts smoothly after 75 °C. The values of activation energies required for oxidative degradation of the sample subjected to 100 kGy are significantly higher in the composite states than in the neat resin. The degradation mechanism of polymerized resins is discussed taking into account the effects of fillers on the stability of studied epoxy resin at various temperatures when the degradation and crosslinking are in competition for the decay of free radical.

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Effect of gamma irradiation on the optical properties of epoxy resin thin films

Cited by 29 publications

References 14 publications

Investigation of structure and optical characteristics of irradiated PVP/CMC nanocomposite films based on ZnS/SnO₂ nanofillers

Investigation of structure and optical characteristics of irradiated PVP/CMC nanocomposite films based on ZnS/SnO₂ nanofillers

Effect of low energy ion beam irradiation on the structural and optical properties of flexible PVA/CuO nano composite films

Stability Qualification of Resins/Metallic Oxide Composites for Surface Oxidative Protection

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Effect of gamma irradiation on the optical properties of epoxy resin thin films

Cited by 29 publications

References 14 publications

Investigation of structure and optical characteristics of irradiated PVP/CMC nanocomposite films based on ZnS/SnO2 nanofillers

Investigation of structure and optical characteristics of irradiated PVP/CMC nanocomposite films based on ZnS/SnO2 nanofillers

Effect of low energy ion beam irradiation on the structural and optical properties of flexible PVA/CuO nano composite films

Stability Qualification of Resins/Metallic Oxide Composites for Surface Oxidative Protection

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Investigation of structure and optical characteristics of irradiated PVP/CMC nanocomposite films based on ZnS/SnO₂ nanofillers

Investigation of structure and optical characteristics of irradiated PVP/CMC nanocomposite films based on ZnS/SnO₂ nanofillers