Effect of electron beam irradiation on the structural properties of poly(vinyl alcohol) formulations with triphenyl tetrazolium chloride dye (TTC)

Ali, Zobia; Said, Hossam M.; Ali, Hussein E.

doi:10.1016/j.radphyschem.2005.05.013

Cited by 18 publications

(3 citation statements)

References 8 publications

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“…All tetrazolium salts convert upon irradiation into colour formazans. This has been used for the preparation of aqueous and alanine dosimetric systems Kriminskaya 1998, Ebraheem et al 1999), that of radiation-sensitive poly(vinyl alcohol) films (Kovács et al 2000, Ali et al 2006, Emi-Reynolds et al 2007, that of textile-based dosimeters (e.g. Kozicki and Sąsiadek 2012) and liquid dosimeters (Kovács et al 1995, Sadeghi et al 2002.…”

Section: Introductionmentioning

confidence: 99%

TTC-Pluronic 3D radiochromic gel dosimetry of ionizing radiation

et al. 2017

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This work reports the first results obtained using a new 3D radiochromic gel dosimeter. The dosimeter is an aqueous physical gel matrix made of poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (Pluronic F-127, PEO-PPO-PEO) doped with a representative of tetrazolium salts, 2, 3, 5-triphenyltetrazolium chloride (TTC). There were several reasons for the choice of Pluronic as a gel forming substrate: (i) the high degree of transparency and colourlessness; (ii) the possibility of gel dosimeter preparation at both high and low temperatures due to the phase behaviour of Pluronic; (iii) the broad temperature range over which the TTC-Pluronic dosimeter is stable; and (iv) the non-toxicity of Pluronic. A reason for the choice of TTC was its ionising radiation-induced transformation to water-insoluble formazan, which was assumed to impact beneficially on the spatial stability of the dose distribution. If irradiated, the TTC-Pluronic gels become red but transparent in the irradiated part, while the non-irradiated part remains crystal clear. The best obtained composition is characterised by <4 Gy dose threshold, a dose sensitivity of 0.002 31 (Gy × cm), a large linear dose range of >500 Gy and a dynamic dose response much greater than 500 Gy (7.5% TTC, 25% Pluronic F-127, 50 mmol dm tetrakis). Temporal and spatial stability studies revealed that the TTC-Pluronic gels (7.5% TTC, 25% Pluronic F-127) were stable for more than one week. The addition of compounds boosting the gels' dose performance caused deterioration of the gels' temporal stability but did not impact the stability of the 3D dose distribution. The proposed method of preparation allows for the repeatable manufacture of the gels. There were no differences observed between gels irradiated fractionally and non-fractionally. The TTC-Pluronic dose response might be affected by the radiation source dose rate-this, however, requires further examination.

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Section: Introductionmentioning

confidence: 99%

TTC-Pluronic 3D radiochromic gel dosimetry of ionizing radiation

et al. 2017

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“…It is recognized that, some of the desired physical and chemical properties of the material may be modified with exposure to high energetic radiations like electrons [9], gamma rays, ions, UV-radiation [10] and microwave etc. In recent years irradiation is treated as an effective tool for structural modification of polymers and radiation induced microstructural changes play a significant role in the material applications.…”

Section: Introductionmentioning

confidence: 99%

Electron Beam Induced Microstructural Changes and Electrical Conductivity in Bakelite RPC Detector Material

Kumar

Ravikumar

Sanjeev

et al. 2015

IEEE Trans. Nucl. Sci.

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To explore the structural modifications in terms of crosslink density and electrical conductivity in polymer based Bakelite RPC detector material was exposed to 8 MeV electron beam with the irradiation doses of 20 kGy to 100 kGy in steps of 20 kGy. The microstructural changes of Bakelite upon electron beam irradiation have been studied using Positron Annihilation Lifetime Spectroscopy (PALS), X-ray Diffraction (XRD) and Fourier Transform Infrared (FTIR) Spectroscopy. Positron lifetime parameters viz., o-Ps lifetime and its intensity showed chain scission at lower doses (at 20 kGy and 40 kGy) followed by crosslinking due to the radical reactions. These changes are effectively explained with the help of FTIR and XRD parameters. The reduction in electrical conductivity of Bakelite material beyond 60 kGy is correlated between conducting pathways and crosslinks in the polymer matrix. The appropriate dose of electron beam on Bakelite might reduce the leakage current of Bakelite RPC detector material and hence improves the performance of the detector.

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“…Cellulose triacetate is one of the polymers that his been usefully employed in a number of different fields of science and technology [6]. Several investigations have been introduced to study the changes in physical properties of polymers due to irradiation [7][8][9][10][11][12][13][14]. The aim of the present study is to obtain information concerning the interaction of electron beam rays with cellulose triacetate polymer to improve its performance in several industrial applications.…”

Section: Introductionmentioning

confidence: 99%