Influence of gamma irradiation on physical and chemical properties of Makrofol (NTD) material

Abdul-Kader, A.M.; Zaki, M. F.; Radwan, R.M.; Abuhadi, Nouf

doi:10.1016/j.radphyschem.2018.05.010

Cited by 13 publications

(4 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Irradiated polymeric materials with ionizing radiation such as γ-rays, X-rays, accelerated electrons, and ion beams leads to the formation of very reactive intermediates products like excited states, ions, and free radicals, which result in rearrangements and/or formation of new bonds. The effects of these reactions lead to the formation of oxidized products, grafts, scission of main chain (degradation), or cross-linking beside its effects on the optical, thermal, and electrical behavior of such polymer (Zahran et al 1981;Saad et al 2014;Fares 2011;Tayel et al 2015;Rammah 2015Rammah , 2017Al-Amri et al 2017;Alfaramawi et al 2017;Alsalhi et al 2017;Jaleh et al 2017;Rammah and Abdalla 2017;Saad et al 2018;Abdul-Kader et al 2018). Degradation and cross-linking occur simultaneously, and the outcome of the process is determined by a competition between the reactions (Kumar et al 2006;Sinha et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Electrical and optical properties of Makrofol DE 1-1 polymeric films induced by gamma irradiation

2019

View full text Add to dashboard Cite

Background: A set of Makrofol DE 1-1 polymeric samples was irradiated to different gamma doses. The dielectric response of irradiated polymers was investigated at a wide range of frequencies at room temperature. The modification induced in optical properties include the optical band gap (E optical ), number of carbon per cluster (M), number of carbon per length (N), and refractive index (n) for irradiated samples were studied as well. Methods: The dielectric constant (έ), dielectric loss factor (ε˝), loss tangent (tanδ), the ac electrical conductivity (σ ac ), and impedance (Z) were measured in the frequency range from (100) Hz to (100) MHz. The optical band gap energy and its corresponding parameters for the samples were evaluated using ineffective thickness method (ITM). Results: Gamma-ray irradiation had a considerable effect on the optical band gap energy for Makrofol DE 1-1 polymer detector film, which decreases from 4.20 to 3.96 eV and 4.35 to 4.16 eV for indirect and direct allowed transitions in ITM method, respectively, while it decreases from 4.40 to 4.20 eV in DITM method as a result of γ-ray dose increases. (n) of all studied samples is considerably high. (N) and (M) for the direct transition are lower than that for the indirect transition and their values increase with increasing gamma dose. Conclusion: The results reveal that Makrofol DE1-1 polymer can be used as gamma dosimeter. Furthermore, Makrofol DE1-1 has much greater resistance to radiation damage; the attained results suggested strongly the applicability of Makrofol DE1-1 polymer to be used in medical products applications and suitable for optoelectronic and photoelectric devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrical and optical properties of Makrofol DE 1-1 polymeric films induced by gamma irradiation

2019

View full text Add to dashboard Cite

show abstract

“…It is clear that the blank sample has characteristic band intensities corresponding to specific functional groups. From figure 2, the characterized absorption bands of Makrofol film are observed at 886, 1798, 2331, 2879, 3049, and 3528 cm −1 that are related to the functional groups C-O-C bond, C=O bond, CO 2 , CH 3 bond, C-H stretching bond, and OH bond, respectively [9,23]. The changes in the peak intensity of the irradiated samples have been estimated to the peak intensity of the functional groups present in the pristine sample.…”

Section: Ftir Analysismentioning

confidence: 99%

“…Nowadays, irradiation of polymers by gamma-ray, ion beam and electron beam is used to enhance the polymer properties for using in technological applications [4][5][6][7][8]. Exposure of polymers to different type of irradiation like gamma-ray, ion beam and electron beam causes polymer structure destruction and consequently, several series of changes can occur like; chain scission, bond breaking, creation of unsaturated bonds, intermolecular cross-linking, carbon-rich clusters, free radicals formation and the capability of the hydrogen molecules to fleeing from the irradiated polymer [9]. Furthermore, the gamma irradiation exposure has a great influence on the morphological, optical and structural properties of the polymeric materials and polymer composition, due to the destruction of the chemical bonds and creation of highly energetic electrons as a result of the influence of γ-irradiation [4][5][6][7][8][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Structural and optical analysis of gamma-induced modification in polycarbonate nuclear track detector

et al. 2021

View full text Add to dashboard Cite

Makrofol BL 6-2 films were irradiated with gamma-doses from 45 kGy to 225 kGy. FTIR, surface roughness, UV/Vis and photoluminescence (PL) spectrometers were used to study the change in structure and optical properties of irradiated films. The FTIR spectra exhibit that the band intensities of chemical bonds of irradiated-films are affected by irradiation according to the value of gamma dose. An enhancement of the surface roughness parameters was observed in the irradiated-films. UV/Vis spectra showed that the optical absorption of irradiated films is shifted toward the lower photon energies with an increase in gamma-doses. This shift was associated with the decrease in energy gap. The obtained results of optical parameters are modified after irradiation. The PL results confirm that the photoemission property is modified by gamma-irradiation. The acquired results can help in modifying and modeling the properties of such irradiated polycarbonate films for their use in industrial and radiation dosimetric applications.

show abstract

“…This produces silver sulphide (Ag 2 S) particles embedded within the PVA network, by adding AgNO 3 via esterification reduction of H 2 SO 4 . Then, the prepared mixture was irradiated with gamma radiation at 30 kGy using 60 Co gamma-ray source, at a fixed dose rate of 3 kGy/h, at Atomic Energy Authority, Cairo, Egypt [18]. In comparison with chemical techniques, exposure of the sulfonated PVA to gamma radiation does not produce any byproducts [19].…”

Section: Experimental Preparationmentioning

confidence: 99%

Optical constants of gamma‐irradiated silver‐doped PVA in the near‐infrared range

Salah

Gad

Elkattan³

et al. 2020

Micro & Nano Letters

View full text Add to dashboard Cite

Pure and gamma-irradiated silver-doped polyvinyl alcohol 'PVA' samples are fabricated, and their optical constants are experimentally determined through the measurement of the reflectance and the transmittance. Using the thin-film model, an iterative method is used to solve for the real and imaginary parts of the refractive index, in the near-infrared (NIR) region. The retrieved refractive index values are verified through a comparison between the theoretical calculations and the practical measurements of the transmittance. The refractive index shows a big increase in the absorption loss of the polymer, when compared to pure PVA. This qualifies the fabricated films for new applications such as optical plasmonic circuits, optical absorbers, solar energy harvesting and sensors in the NIR region. More insight on the functional groups that exist in the fabricated specimens is given by Fourier transform spectroscopy in the mid-infrared range from 400 to 4000 cm −1 .

show abstract

Influence of gamma irradiation on physical and chemical properties of Makrofol (NTD) material

Cited by 13 publications

References 35 publications

Electrical and optical properties of Makrofol DE 1-1 polymeric films induced by gamma irradiation

Electrical and optical properties of Makrofol DE 1-1 polymeric films induced by gamma irradiation

Structural and optical analysis of gamma-induced modification in polycarbonate nuclear track detector

Optical constants of gamma‐irradiated silver‐doped PVA in the near‐infrared range

Contact Info

Product

Resources

About