Investigation of the effect of gamma rays on electrical properties of chlorinated poly (vinyl chloride)

Nouh, S. A.; Abdel‐Naby, Abir S.

doi:10.1080/10420150310001597858

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…In the case of conductive filler particles, the conductivity in the system should increase significantly after reaching this position, which is called the threshold of penetration (Arshak et al, 2005). The DC electrical conductivity, s, was determined from the relation (Nouh & Abdel-Naby, 2003).…”

Section: Electrical Conductivity Measurementsmentioning

confidence: 99%

“…The basic component in active electric circuits whose functioning is depending on dielectric materials is capacitors (Loncar et al, 1998). The Radiation Induced Conductivity (RIC) phenomenon in many kinds of polymers has been studies literature (Omar et al, 2013;Nouh & Abdel-Naby, 2003;Upadhyay & Reddy, 2017). It has been observed that these insulating materials exhibit complex non-linear conduction current (charge transport in dielectric) when used under high dc stress and the maximum voltage level of extruded HVDC cable systems could not be increased beyond a few hundred kilo volts.…”

Section: Introductionmentioning

confidence: 99%

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Effect of low dose gamma radiation on electric conductivity of LDPE and PMMA polymers

Madani¹,

Sardari²,

Hosntalab³

et al. 2020

10.5267/j.esm

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An experimental analysis of the effect of gamma and X-ray irradiation with dose rate 0.25-6mSv/h on low-density polyethylene (LDPE) and PMMA samples is presented. The focus of attention is on their DC conductivity as a dielectric of a capacitor. This system is based on the discharge of a capacitor by radioactive radiation through ionization of the dielectric consists of an inner electrode of the capacitor. The experimental setup contains a special electronic circuit in which polymer samples are placed as dielectric of parallel-plate capacitor which is connected to electrodes and a high voltage power supply is in series with other components of the circuit. It is understood that the resistance of polymers varies with the applied voltage and absorbed gamma ray dose from 137 Cs with 0.661 MeV energy. The influences of this parameter on LDPE and PMMA electrical properties as a result of polarization of dielectric are also presented. The experimental results show elevation of LDPE and PMMA electric conduction properties as irradiation dose rate increases. Indications of predominance of charge accumulation are also observed.

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Section: Electrical Conductivity Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of low dose gamma radiation on electric conductivity of LDPE and PMMA polymers

Madani¹,

Sardari²,

Hosntalab³

et al. 2020

10.5267/j.esm

View full text Add to dashboard Cite

show abstract

“…Therefore, the main objective of this paper is to study the structural, morphological and mechanical properties of γ -ray-irradiated blends of PMMA and PVC at 2 Mrad dose (just lower than the dose of sterilization (2). Moreover, though the effect of γ -radiation on PMMA and PVC has been well studied (9)(10)(11)(12), almost no literature is available on the γ -ray-irradiated blends of PMMA and PVC. This study is also important as PMMA is considered to be a degrading-type and PVC to be a cross-linking-type polymer.…”

Section: Introductionmentioning

confidence: 98%

Study of structural, morphological and mechanical properties of PMMA, PVC and their blends

Kelkar¹,

Soman²

2012

Radiation Effects and Defects in Solids

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PMMA, PVC and their five blends in different compositions were irradiated by γ -rays of 2 Mrad dose. A comparative study of structural, morphological and mechanical properties of irradiated and non-irradiated samples was carried out. The structural changes that have taken place due to irradiation are seen in the FTIR and X-ray diffraction (XRD) spectra. The ester group is mainly affected in PMMA and the blends. The XRD results have confirmed that the irradiated samples are more amorphous in nature than the non-irradiated ones. The DSC study reveals that some irradiated samples undergo cross-linking, whereas some of them undergo degradation. One of the irradiated blend compositions has become thermally more stable. The SEM study suggests that the irradiated samples have undergone curing. An improvement in the mechanical properties has been observed in some of the irradiated blend compositions.

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“…Polymers are often exposed in radiation environments to various kinds of radiations such as gamma rays, X-rays, electrons and ions, which may affect the chemical structure and physical properties of these materials by atomic or molecular excitation and ionization, resulting in the rupture of chemical bonds, intermolecular cross-linking, formation of free radicals and unsaturated bonds, etc. These processes cause defects in the polymer matrices, which are responsible for most of the changes observed in the physico-chemical properties of polymers (4)(5)(6)(7)(8)(9).…”

Section: Introductionmentioning

confidence: 99%

High energy electron irradiation effects on polystyrene films

Mathad

Kumar

Sannakki

et al. 2009

Radiation Effects and Defects in Solids

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The effect of an 8 MeV electron-beam on the structural, optical and dielectric properties of polystyrene films has been investigated respectively by means of Fourier transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-VIS) spectroscopy and electrical impedance (LCR) analysis over a radiation dose in the range of 50-250 kGy using a Microtron accelerator. The FTIR spectral analysis shows no change in the overall structure of the irradiated polystyrene films, except a minor change in the intensity of a few peaks in the FTIR spectrum, indicating that polystyrene is resistant to electron-beam irradiation over the range of radiation doses investigated. The optical band gap analysis using the UV-VIS absorption spectra of the polystyrene shows a small decrease in the optical band gap (E g ) and the activation energy with an increase in electron doses. Further, the dielectric measurements over a frequency range of 100 Hz to 1 MHz for the electron-beam-irradiated polystyrene films show that both the dielectric constant and the dielectric loss increase with an increase in electron radiation dose, which may be ascribed to the formation of defect sites in the band gap of polystyrene as a consequence of molecular chain scission in the polymer films upon irradiation.

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Investigation of the effect of gamma rays on electrical properties of chlorinated poly (vinyl chloride)

Cited by 7 publications

References 11 publications

Effect of low dose gamma radiation on electric conductivity of LDPE and PMMA polymers

Effect of low dose gamma radiation on electric conductivity of LDPE and PMMA polymers

Study of structural, morphological and mechanical properties of PMMA, PVC and their blends

High energy electron irradiation effects on polystyrene films

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