Co-60 gamma radiation assisted diffusion of iodine in polypropylene

Mathakari, N.L.; Bhoraskar, V.N.; Dhole, S.D.

doi:10.1016/j.nimb.2010.06.042

Cited by 8 publications

(21 citation statements)

References 39 publications

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“…Four peaks occur at 2θ ß14°, 16.94°, 18.5°, and 25.5°corresponding to (110), (040), (130), and (041) planes, respectively. 18,19 The XRD pattern of pristine PP sample conforms to the pattern reported by Mishra et al 20 The highly intense peak at 2θ ß16.94°signifies that the polymer is semicrystalline in nature. It is observed in case of carbonirradiated samples (Fig.…”

Section: X-ray Diffraction Studiessupporting

confidence: 83%

“…This is ascribed to the radiation-induced conjugation. 18 Similar results are reported by Saha et al 2 in their 3.6 and 5.4 MeV carbon ion irradiated PP polymer. They had explained that this shift in absorbance is to be due to the generation of some chromophoric groups.…”

Section: Uv-vis Studiessupporting

confidence: 82%

“…15 The growth of this band signifies that the free radicals created due to gamma exposure have reacted with the atmospheric oxygen giving radiation induced oxidation and got converted to peroxides and hydroperoxides and consequently PP is carbonized. 18 In case of carbon ionsirradiated samples, oxidation occurred by a reaction between trapped free radicals and atmospheric oxygen 38 after the ladder (containing samples) was immediately removed from the vacuum chamber (after ion irradiation). But in case of lithium ions irradiation, the ladder was removed almost 3 h after the irradiation due to the high radiation dose level, so the oxidation in case of lithiumirradiated samples was least probable.…”

Section: Uv-vis Studiesmentioning

confidence: 99%

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Impact of Swift Heavy Ions and Gamma Radiation upon Optical, Structural, and Chemical Properties of Polypropylene Polymer Films

Gupta

Singh

et al. 2015

Adv Polym Technol

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ABSTRACT:The present work focuses on the effects of two different ions (70 MeV carbon and 50 MeV lithium) and gamma radiation upon the structural, optical, and chemical properties of 125-μm thick polypropylene (PP) polymer films. The different samples of PP were irradiated with ions to the fluences in the range 10 11 -10 13 ions/cm 2 and exposed to gamma radiation of doses in the range 100-1250 kGy. A comparative study is carried out upon different parameters of irradiated polymer samples such as crystallite size and band gap energy. The structural properties are effectively modified by the ions irradiation, whereas gamma exposure shows insignificant changes in this regard; however, gamma exposure is observed to be effective in gradually decreasing the band gap energy of the PP samples with an increase in the gamma dose. The formation of new chemical bands is observed in the ion-irradiated and gamma-exposed PP polymer samples. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2015; View this article online at wileyonlinelibrary.com.

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Section: X-ray Diffraction Studiessupporting

confidence: 83%

Section: Uv-vis Studiessupporting

confidence: 82%

Section: Uv-vis Studiesmentioning

confidence: 99%

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Impact of Swift Heavy Ions and Gamma Radiation upon Optical, Structural, and Chemical Properties of Polypropylene Polymer Films

Gupta

Singh

et al. 2015

Adv Polym Technol

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“…The irradiation of polymer by energetic radiation such as electrons, ions and gamma rays has several industrial and technological applications, a few of which include radiation cross-linking, scissioning, surface modification, radiation curing of coatings, radiation-assisted grafting, radiation sterilization, radiation-assisted diffusion, compatibilization of polymer blends, irradiation of hydrogels, irradiation of natural polymers, recycling of polymers wastes, electronic property materials, ion track membranes, microdevice production (lithography), nanotechnology, etc. Most of these applications are exhibited by Co-60 gamma rays also (14)(15)(16).…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the effects of Co-60 gamma radiation on polypropylene and polyimide

Mathakari¹,

Bhoraskar²,

Dhole³

2014

Radiation Effects and Defects in Solids

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Polypropylene (PP) and polyimide (PI), which belong to entirely different classes of polymers, are irradiated by Co-60 gamma radiation under similar doses and similar conditions in the dose range varying from 57.6 to 230.4 kGy. The radiation responses of these two polymers are analyzed by various characterizations such as Fourier transform infrared, UV-visible, energy-dispersive spectroscopy, X-ray diffraction, scanning electron microscopy and contact angle. PP shows substantial modifications in its structure and properties while in the same dose range, PI shows remarkable stability. These two different responses are interpreted in terms of physicochemical structure and properties of these polymers.

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“…After their irradiation, polymers undergo some important physicochemical changes such as chain scissioning, crosslinking, molecular rearrangements, increased chemical activity (due to generation of highly reactive species named free radicals), evolution of gases, creation of defects (such as voids/diluted density regions, blisters, globules and cracks), oxidation, carbonization etc. 17,19,[27][28][29] . Many of such changes can result in the increase in fractional free volume.…”

Section: Introductionmentioning

confidence: 99%

6 MeV electron beam induced diffusion of iodine in isotactic polypropylene

et al. 2011

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Polypropylene is irradiated by 6 MeV electrons in presence of Iodine and subsequently characterized by the techniques such as weight gain, weight loss, Energy Dispersive Spectroscopy (EDS), Scanning Electron microscopy (SEM), Ultraviolet Visible Spectroscopy (UV-Vis), Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray diffraction (XRD). It is unambiguously observed that the electron beam assists the doping and trapping of volatile Iodine in Polypropylene. Presence of the Iodine during irradiation strongly supports the radiation-induced decrease in the band gap up to almost visible region. Further, the doped Iodine strongly interacts and decreases the crystalline structure of the Polypropylene. It is also observed that the nanoclusters of Iodine having size around 100 nm are formed on the surface of Polypropylene due to electron irradiation.

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Co-60 gamma radiation assisted diffusion of iodine in polypropylene

Cited by 8 publications

References 39 publications

Impact of Swift Heavy Ions and Gamma Radiation upon Optical, Structural, and Chemical Properties of Polypropylene Polymer Films

Impact of Swift Heavy Ions and Gamma Radiation upon Optical, Structural, and Chemical Properties of Polypropylene Polymer Films

A comparative study on the effects of Co-60 gamma radiation on polypropylene and polyimide

6 MeV electron beam induced diffusion of iodine in isotactic polypropylene

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