Electron beam crosslinking of poly(ethylene-co-vinyl acetate)/clay nanocomposites

Sharif, Jamaliah; Dahlan, Khairul Zaman Mohd; Yunus, Wan Md Zin Wan

doi:10.1016/j.radphyschem.2007.02.091

Cited by 44 publications

(28 citation statements)

References 12 publications

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“…Therefore, mechanical properties of LDPE/EVA/PCR/MWNT nanocomposites were investigated in detail. Radiation processing of these nanocomposites may further affect the mechanical properties due to crosslinking/degradation of the polymer matrix [38, 39]. Young modulus of the composites was found to increase with the MWNT content and radiation dose (Fig.…”

Section: Resultsmentioning

confidence: 99%

Percutaneous coronary intervention for chronic total occlusions: Improved survival for patients with successful revascularization compared to a failed procedure

Aziz

Stables²,

Grayson³

et al. 2007

Cathet Cardio Intervent

105

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Section: Resultsmentioning

confidence: 99%

Percutaneous coronary intervention for chronic total occlusions: Improved survival for patients with successful revascularization compared to a failed procedure

Aziz

Stables²,

Grayson³

et al. 2007

Cathet Cardio Intervent

105

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show abstract

“…The acidic sites can accept a single electron from donor molecules with low ionization potentials, thereby producing free radicals [40]. These free radicals can accelerate oxidative degradation or induce the crosslinking of polymeric chains [17]. Oxidative degradation can be accelerated by oxygen from the atmosphere.…”

Section: Gel Fractionmentioning

confidence: 99%

“…An important advantage of irradiation crosslinking is the capability of introducing crosslinks into a polymer at low temperatures [16]. Radiation crosslinking is a very useful technique to improve the thermal stability, stress-crack resistance, solvent resistance, and toughness of polymeric materials [17]. Previously, the effect of irradiation crosslinking was studied in poly(vinyl chloride) (PVC)/epoxidized natural rubber (ENR 50) blend [18], Nylon 1010 and high-impact polystyrene blend [19], acrylonitrile-butadiene copolymer (NBR)/PVC blend [20], etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of electron beam irradiation on the properties of ethylene‐(vinyl acetate) copolymer/natural rubber/organoclay nanocomposites

Munusamy¹,

Ismail²,

Mariatti³

et al. 2009

Vinyl Additive Technology

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The effects of electron beam (EB) irradiation on the morphology, crosslink density, and tensile properties of EVA/SMR L (Standard Malaysian Rubber)/organoclay nanocomposites prepared by a melt-blending technique were investigated. All the samples were irradiated by using a 3.0-MeV EB apparatus with doses ranging from 50 to 200 kGy. Organoclay loading was varied from 0 to 10 phr (parts by weight per hundred parts of resin). X-ray diffraction results and transmission electron microscopy images proved that the dispersion of organoclay in the nanocomposites was slightly improved by EB irradiation. The gel fraction yield for the nanocomposites increased with irradiation dose but decreased with organoclay loading. However, at 200 kGy, the gel fraction yield was almost the same at all organoclay loadings. Tensile strength and stress at 100% elongation increased proportionally with the irradiation dose. Elongation at break of the nanocomposites increased up to 100 kGy but then decreased at higher irradiation doses. The intercalation and exfoliation of the organoclay, the barrier effect, and the Hofmann degradation of the modification agent are the three major factors leading to the improvement of the properties of the irradiated nanocomposites. J. VINYL

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“…This range is suitable to induce crosslinking in both the matrices without causing excessive degradation of either one of the blend component. 11,12 This blend has a large potential as a zero halogen material to substitute plasticized PVC in various applications. 13,14 Incorporation of organoclay improves the mechanical properties, thermal stability, flame retardancy and resistance to water absorption of the blend as been proven in our earlier research work.…”

Section: Etcmentioning

confidence: 99%

Effect of organoclay loading on the crosslinking and degradation of irradiated ethylene(vinyl acetate) copolymer/natural rubber nanocomposites

Munusamy

Ismail

Ratnam

2012

Journal of Reinforced Plastics and Composites

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The effects of organoclay loading and electron beam irradiation on the crosslinking and degradation of ethylene(vinyl acetate) copolymer (EVA)/natural rubber, grade Standard Malaysian Natural Rubber (SMR L) nanocomposites was studied. The nanocomposites were prepared through the melt blending technique with the ratio of EVA: SMR L fixed at 50:50 and organoclay loading varied from 0 to10 phr. The samples were irradiated using a 3.0 MeV EB machine with doses ranging from 50 to 200 kGy. At irradiation dose 50-150 kGy organoclay reduces the crosslinking yield significantly as evidenced from the gel fraction results and thus, storage modulus decreases and tan delta max values increases for the nanocomposites compared to neat EVA/SMR L. However, at 200 kGy the crosslinking yield was not much affected by the organoclay and thus, the storage modulus increased and tan delta max decreased. Scanning electron micrograph images show that different level of irradiation dose form different phase morphology on the nanocomposites. Analysis on Fourier transform infrared spectrums and carbonyl index values proved that the nanoscale dispersion and barrier effect of organoclay influence the crosslinking and degradation of the nanocomposites thus gives a significant effect on the dynamic mechanical properties.

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Electron beam crosslinking of poly(ethylene-co-vinyl acetate)/clay nanocomposites

Cited by 44 publications

References 12 publications

Percutaneous coronary intervention for chronic total occlusions: Improved survival for patients with successful revascularization compared to a failed procedure

Percutaneous coronary intervention for chronic total occlusions: Improved survival for patients with successful revascularization compared to a failed procedure

Effect of electron beam irradiation on the properties of ethylene‐(vinyl acetate) copolymer/natural rubber/organoclay nanocomposites

Effect of organoclay loading on the crosslinking and degradation of irradiated ethylene(vinyl acetate) copolymer/natural rubber nanocomposites

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