Proton Beam Induced Modification of Luminescence Properties of Polystyrene/Al2O3 Polymer Nanocomposites

Bhavsar, S. R.; Singh, Navjot; Suryanarayana, S. V.; Murthy, K. V. R.

doi:10.1007/s10895-019-02414-z

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…The observed UV/VIS changes could be interpreted by ion beam radiation-induced formation of extensive systems of conjugated double bonds. Ion beam irradiation of polymeric samples causes bond breaking and formation of new bond, leading to a combination of degradation and crosslinking reaction, with formation of unsaturated products [24][25][26]. Clearly, the absorbance spectrum of both pristine PVC and EVA samples gradually increases with increasing ion beam fluence, this is due to chain degradation reaction.…”

Section: Ultraviolet Visible (Uv/vis) Studiesmentioning

confidence: 99%

Nitrogen ion beam radiation induced modification on physico-chemical properties of poly (vinyl chloride)/ethylene vinyl acetate blends

Waly,

Shehata,

abdel reheem

et al. 2024

Arab Journal of Nuclear Sciences and Applications

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Poly (vinyl chloride) (PVC), ethylene vinyl acetate (EVA), and PVC/EVA (50/50 wt%) samples were synthesized using casting technique. The as-prepared samples were irradiated with various fluencies of nitrogen ion beam, using a broad beam cold cathode ion source. The structural, optical and thermal properties of pristine and irradiated samples were investigated using FTIR, XRD, UV-VIS, and TGA analytical techniques. FTIR and XRD investigation showed several changes in the crystal structure, intensity and position of the characteristic peaks for the investigated samples. The optical band gap energies for both PVC and EVA samples is being to decrease with increasing ion beam fluence, whereas 50/50 wt% PVC/EA blend sample exhibits an increment behavior as a result of increasing ion beam fluence. The thermal stability of ion beam bombarded samples decreased for PVC and EVA samples than that for pristine samples, whereas a noticeable increase in the stability of the 50/50 wt% PVC/EVA blend samples. It is clear that thermal decomposition is affected by nitrogen ion beam fluencies owing to the extent of crosslinking and degradation processes. The results showed that nitrogen ion beam bombardment significantly affect the physico-chemical properties of PVC, EVA, and PVC/EVA samples.

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Section: Ultraviolet Visible (Uv/vis) Studiesmentioning

confidence: 99%

Nitrogen ion beam radiation induced modification on physico-chemical properties of poly (vinyl chloride)/ethylene vinyl acetate blends

Waly,

Shehata,

abdel reheem

et al. 2024

Arab Journal of Nuclear Sciences and Applications

View full text Add to dashboard Cite

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“…The physical and chemical properties of nanocomposites can be changed by electronic excitation and controlled ionization to produce active sites, and then the functions of materials can be adjusted quickly and effectively. 21 For example, Bang et al 22 not only improved the responsiveness of a NO 2 sensor, but also improved its tolerance to humidity through irradiation technology. Van et al 23 induced defects and controlled doping levels by γ-irradiated SnO 2 films, thereby enhancing the gas-sensitive properties of the device.…”

Section: Introductionmentioning

confidence: 99%

High sensitivity microcrack hydroxylated MWCNT/Ecoflex composite flexible strain sensors based on proton irradiation engineering

et al. 2023

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“…Several reports are available on thermoluminescence (TL) of pure PS irradiated with different radiations . However, there are only a few reports found in the published literature on doped PS exhibiting TL, although some dopants have been reported to modify other properties of irradiated PS . In particular, it should be noted that accidental dosimetry is very important to prevent health hazards by nonapparent radiation dose.…”

Section: Introductionmentioning

confidence: 99%

Effect of γ‐irradiation on thermal and thermoluminescence properties of polystyrene/europium (III) oxide composite film

Bhavsar

Singh

2019

Luminescence

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In the present study, polystyrene:europium (III) oxide polymer films at a ratio of 95:5 wt% were prepared using a solution casting technique. These polymeric films were irradiated with 5, 25 and 50 kGy γ-radiation doses and their thermoluminescence (TL) and thermal properties were studied as a function of radiation dose. Analysis of Fourier transform infrared spectra revealed different modes of vibration and polymer-filler interaction. Reduction of vibrational modes with radiation dose was observed. The TL glow curve intensity was observed to increase with increasing radiation dose and to become broader in the 378 K and 444 K regions. Detrapping of electrons implied by the glow curve was caused by thermally induced macromolecular motion, concurrent with β-relaxation in polystyrene. The TL glow curve parameters were computed using a glow curve deconvolution method. Differential scanning calorimetry analysis indicated that the glass transition temperature (T g ) increased with increase in dose, suggesting crosslinking of the polymer chain. Scanning electron microscopy analysis evidenced the change in surface morphology due to γirradiation. K E Y W O R D S europium (III) oxide, γ-irradiation, polystyrene, thermoluminescence 1 | INTRODUCTION Polymers have received more attention and increased interest from scientists and researchers for potential application in the fields of science and technology. Compared with other host matrices, polymers have become a more favourable host matrix for optical and electronic applications. Devices made from polymers have become more flexible, are of high mechanical strength, and are light in weight. In this study, polystyrene (PS) was used as a host because of its excellent mechanical strength, good thermal resistance, and good chemical stability. As per requirement, alterations in the properties of polymer can be carried out by doping with metal oxides such as Al 2 O 3 , ZnO and TiO 2 .But rather than using metal oxides, rare earth ions are more useful because they show vibronic characteristics in the optical spectrum.Among all rare earth ions, Eu 3+ ions are widely used due to their electronic transition of excitation, emission, and absorption spectra, caused by the occurrence of vibronic characteristics. [1] However, rare

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Proton Beam Induced Modification of Luminescence Properties of Polystyrene/Al2O3 Polymer Nanocomposites

Cited by 5 publications

References 19 publications

Nitrogen ion beam radiation induced modification on physico-chemical properties of poly (vinyl chloride)/ethylene vinyl acetate blends

Nitrogen ion beam radiation induced modification on physico-chemical properties of poly (vinyl chloride)/ethylene vinyl acetate blends

High sensitivity microcrack hydroxylated MWCNT/Ecoflex composite flexible strain sensors based on proton irradiation engineering

Effect of γ‐irradiation on thermal and thermoluminescence properties of polystyrene/europium (III) oxide composite film

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