On the Structural Stability of Montmorillonite Submitted to Heavy γ-Irradiation

Negron, Alicia; Ramos, S.; Blumenfeld, A.L.; Pacheco, G.; Fripiat, J. J.

doi:10.1346/000986002761002649

Cited by 27 publications

(7 citation statements)

References 3 publications

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“…Nanoclay could moderate the effect of irradiation on the polymeric matrix. The crystal structure of nanoclay has high‐enough resistance to bear high irradiation doses without any significant structural change . Exfoliated naonoclay can work as a barrier which inhibits the diffusion of oxygen into the polymeric matrix.…”

Section: Resultsmentioning

confidence: 99%

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Thermal, mechanical, and corrosion resistance properties of vinyl ester/clay nanocomposites for the matrix of carbon fiber‐reinforced composites exposed to electron beam

Razavi

Dehghanpour

Ahmadi

et al. 2015

J of Applied Polymer Sci

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Vinyl ester/clay nanocomposites with 1, 3, and 5% nanoclay contents were prepared. X‐ray diffractography patterns and Scanning Electron micrographs showed that nanocomposites with the exfoliated structure were formed. Thermogravimetric analysis, water absorption test, and Tafel polarization method, respectively, revealed the improvements in thermal resistance, water barrier properties, and corrosion resistance properties of the samples with an increase in the amount of the incorporated nanoclay. Tensile tests showed that nanoclay also enhanced the mechanical properties of the polymer, so that the tensile strength of the samples with 5% nanoclay was more than 3 times higher than tensile strength of pure vinyl ester samples. Overall, the best properties were observed for the samples containing 5% nanoclay. Pure vinyl ester and nanocomposite with 5% nanoclay content were exposed to the electron beam radiation and their mechanical properties improved up to 500 kGy irradiation dose. Finally, pure vinyl ester and vinyl ester/nanoclay (5%) matrixes were reinforced with carbon fiber and the effect of electron beam irradiation on their mechanical properties was examined. The tensile strength and the modulus of the samples initially increased after exposure to the radiation doses up to 500 kGy and then a decrease was observed as the irradiation dose rose to 1000 kGy. Moreover, nanoclay moderated the effect of the irradiation. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42393.

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Section: Resultsmentioning

confidence: 99%

“…The crystal structure of nanoclay has highenough resistance to bear high irradiation doses without any significant structural change. 17,18 Exfoliated naonoclay can work as a barrier which inhibits the diffusion of oxygen into the polymeric matrix. Thus, degradation via oxidation will be retarded.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Thermal, mechanical, and corrosion resistance properties of vinyl ester/clay nanocomposites for the matrix of carbon fiber‐reinforced composites exposed to electron beam

Razavi

Dehghanpour

Ahmadi

et al. 2015

J of Applied Polymer Sci

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“…The highest weight loss at the 50 KGyirradiated samples may be connected with the superiority of the destruction process over the crosslinking in the initial doses. 1 However, when OMT is present, the clay layers efficiently inhibit the diffusion of oxygen in the nanocomposites and decrease the destructure process in air atmosphere, since the crystal structure of montmorillonite has high enough stability to accumulate high irradiation doses without distinct damage, 15,16 which results in the nanocomposite showing superior irradiation-resistance properties than the pure blend.…”

Section: Thermal Degradation Stabilitymentioning

confidence: 99%

Influence of gamma irradiation on high density polyethylene/ethylene‐vinyl acetate/clay nanocomposites

Kong

et al. 2004

Polymers for Advanced Techs

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The study of high density polyethylene (HDPE)/ethylene-vinyl acetate (EVA)/and organicallymodified montmorillonite (OMT) nanocomposites prepared by melt intercalation followed by exposure to gamma-rays have been carried out. The morphology and properties of the nanocomposites were studied using X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and cone calorimetry. The purpose of the study focuses on the influence of gamma irradiation on the morphology, thermal stability and flammability properties of the nanocomposites. XRD studies and TEM images verified that the ordered intercalated nanomorphology of the nanocomposites was not disturbed by gamma irradiation. TGA data showed that the nanodispersion of clay throughout the polymer inhibited the irradiation degradation of HDPE/EVA blend, which led to the nanocomposites exhibiting superior irradiation-resistant properties than that of the pure blend. Cone calorimetry results indicated that the improvement in heat release rate (HRR) for irradiated HDPE/EVA blend was suppressed efficiently when clay was present. Increasing clay loading from 2 to 10% was beneficial by improving the flammability properties of the nanocomposites, but promoted a rapid increase in the sub-peak HRR at high irradiation dose level.

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“…As far as we are aware, apart from its use for fabrication of nanocomposites, MMT has been used as engineering barriers in storaging of radioactive wastes due to its stable crystal structure when exposed to high doses of radiation without distinct damage [12,13].…”

Section: G-irradiationmentioning

confidence: 99%

Radiation induced modification of NBR and SBR montmorillonite nanocomposites

Mohamed¹

2013

Journal of Industrial and Engineering Chemistry

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On the Structural Stability of Montmorillonite Submitted to Heavy γ-Irradiation

Cited by 27 publications

References 3 publications

Thermal, mechanical, and corrosion resistance properties of vinyl ester/clay nanocomposites for the matrix of carbon fiber‐reinforced composites exposed to electron beam

Thermal, mechanical, and corrosion resistance properties of vinyl ester/clay nanocomposites for the matrix of carbon fiber‐reinforced composites exposed to electron beam

Influence of gamma irradiation on high density polyethylene/ethylene‐vinyl acetate/clay nanocomposites

Radiation induced modification of NBR and SBR montmorillonite nanocomposites

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