Effects of High-Energy Electron Beam Irradiation on the Properties of Flame-Retardant HDPE/EVA/Mg(OH)<sub>2</sub>Composites

Liu, Hui; Tong, Lifang; Fang, Zhengping; Wang, Yongchang; Alkadasi, Nabil A. N.

doi:10.1080/03602550802355859

Cited by 14 publications

(8 citation statements)

References 10 publications

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“…The thermogravimetric studies of polyolefin/MH composites showed two‐step mass loss, wherein the first step mass loss is generally attributed to the dehydration of MH and the second step mass loss to the polymer backbone chain scission 2, 21, 32. In this study, only one step mass loss is observed in the thermograms, which indicate that the incorporation of compatibilizers have imparted stability to MH, which do not show dehydration before the PE degradation.…”

Section: Resultsmentioning

confidence: 53%

Influence of gamma radiation on compatibilized LLDPE/magnesium hydroxide/sepiolite composites

Ahmad

Shafiq

Yasin

2012

J of Applied Polymer Sci

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The influence of gamma irradiation on the properties of compatibilized linear low-density polyethylene/magnesium hydroxide (MH)/sepiolite composites has been investigated. Vinyl triethoxy silane and maleated polyethylene have been used as compatibilizers. The compatibilizing effect in the composites is confirmed by the Fourier transform infrared spectra, which showed the presence of additional chemical bonds, which are responsible for the enhanced polymer-filler interaction. As a result, the miscibility of the polar additives into the nonpolar polymer matrix is enhanced. The scanning electron micrographs revealed that the additives are well embedded and uniformly dispersed in the polymer matrix without any voids. The known thermal decomposition temperature of MH ($ 350 C) is also increased in the compatibilized composites. In addition, 150 kGy irradiated composite showed a remarkable improvement of 37 C in the onset degradation temperature of unirradiated composite. Furthermore, the formation of radiation crosslinked structure in the composites also improved the mechanical properties of the composites.

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Section: Resultsmentioning

confidence: 53%

Influence of gamma radiation on compatibilized LLDPE/magnesium hydroxide/sepiolite composites

Ahmad

Shafiq

Yasin

2012

J of Applied Polymer Sci

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“…Ethylene–vinyl acetate (EVA) copolymers are used extensively in the wire and cable industry for making heat-shrinkable insulation and semiconductive and insulation jackets. 1 The wire and cable industry takes advantage of two of the properties of EVA: the ability to accept high filler loadings without embrittlement or loss of mechanical integrity and the ease of cross-linking. 2 Compared to polyethylene and polyvinyl chloride, EVA has better flexibility, toughness, and clarity, but lower chemical resistance.…”

Section: Introductionmentioning

confidence: 99%

“…2 Compared to polyethylene and polyvinyl chloride, EVA has better flexibility, toughness, and clarity, but lower chemical resistance. 1,2 The facile flammability and awful smoke emission while burning strictly limits the practical application of EVA. To achieve the required flame-retarded grade of low smoke and nontoxic character, metal hydroxides, such as magnesium hydroxide (MH) or aluminum hydroxide, are advised to be added in EVA matrix.…”

Section: Introductionmentioning

confidence: 99%

Properties of ethylene–vinyl acetate filled with metal hydroxide

Sabet

Hassan

Ratnam

2013

Journal of Elastomers & Plastics

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In this study, the properties of ethylene-vinyl acetate (EVA) and EVA filled with aluminum (aluminum trihydrate; ATH) and magnesium hydroxide (MH) as halogen-free flame-retardant materials were studied. Scanning electron microscopic analysis revealed that MH in EVA matrix is platy in structure, considerably broad size distribution and well homogeneously distributed, whereas ATH particles are smaller and much more homogeneous in size. Addition of ATH or MH to EVA had an impressive affection on the thermal aging and flame tests but impaired the blend mechanical properties. This research explored that in comparison with ATH, addition of MH to EVA blends was more efficient and suitable in all mechanical, thermal, and flammability tests.

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“…Compared with other cross-linking methods, the major advantages of high-energy electron beam irradiation are pollution-free, high efficiency, long service life, uniform cross-linking degree, and excellent heat-resistance and cold-resistance properties. Moreover, high-energy electron beam irradiation can also improve the flame-retardant property of the polymer matrix …”

Section: Introductionmentioning

confidence: 99%

“…Moreover, high-energy electron beam irradiation can also improve the flame-retardant property of the polymer matrix. 29 The aim of this work is to provide a formulation for the HFFR EVA with excellent properties through combining microencapsulation with electron beam irradiation technology. In this study, EVA was flame resistanced by a char-forming agent (CFA) and silica gel MCAPP and then cross linked by high-energy electron beam irradiation.…”

Section: Introductionmentioning

confidence: 99%

Electron Beam Irradiation Cross Linking of Halogen-Free Flame-Retardant Ethylene Vinyl Acetate (EVA) Copolymer by Silica Gel Microencapsulated Ammonium Polyphosphate and Char-Forming Agent

Wang

Tai

Nie

et al. 2011

Ind. Eng. Chem. Res.

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Flame-retardant ethylene vinyl acetate copolymer (EVA) by silica gel-microencapsulated ammonium polyphosphate (MCAPP) and char-forming agent (CFA) have been cross linked by electron beam irradiation. The effects of electron beam irradiation on the electrical, thermal, mechanical, and flame-retardant properties of irradiated EVA composites were investigated. The thermal degradations of EVA/MCAPP/CFA composites were characterized by real-time Fourier transform infrared spectra and thermogravimetric analysis/infrared spectrometry. The results showed that a joint effect on the flame retardancy of EVA composites existed between the MCAPP and CFA. The volume resistivity and mechanical and thermal properties of the irradiated EVA composites were also evidently improved at appropriate irradiation dose as compared with those of unirradiated EVA composites, whereas the volatilized products for the combustible gases were decreased. Furthermore, the irradiated EVA composites can still pass UL-94 V-0 rating after treatment by water for 7 days at 50 °C, indicating excellent water resistance. This investigation provides a promising formulation for the halogen-free flame-retardant EVA with excellent properties.

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Effects of High-Energy Electron Beam Irradiation on the Properties of Flame-Retardant HDPE/EVA/Mg(OH)₂Composites

Cited by 14 publications

References 10 publications

Influence of gamma radiation on compatibilized LLDPE/magnesium hydroxide/sepiolite composites

Influence of gamma radiation on compatibilized LLDPE/magnesium hydroxide/sepiolite composites

Properties of ethylene–vinyl acetate filled with metal hydroxide

Electron Beam Irradiation Cross Linking of Halogen-Free Flame-Retardant Ethylene Vinyl Acetate (EVA) Copolymer by Silica Gel Microencapsulated Ammonium Polyphosphate and Char-Forming Agent

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Effects of High-Energy Electron Beam Irradiation on the Properties of Flame-Retardant HDPE/EVA/Mg(OH)2Composites

Cited by 14 publications

References 10 publications

Influence of gamma radiation on compatibilized LLDPE/magnesium hydroxide/sepiolite composites

Influence of gamma radiation on compatibilized LLDPE/magnesium hydroxide/sepiolite composites

Properties of ethylene–vinyl acetate filled with metal hydroxide

Electron Beam Irradiation Cross Linking of Halogen-Free Flame-Retardant Ethylene Vinyl Acetate (EVA) Copolymer by Silica Gel Microencapsulated Ammonium Polyphosphate and Char-Forming Agent

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Effects of High-Energy Electron Beam Irradiation on the Properties of Flame-Retardant HDPE/EVA/Mg(OH)₂Composites