Investigation of interfacial modification for flame retardant ethylene vinyl acetate copolymer/alumina trihydrate nanocomposites

Zhang, Xingui; Guo, Fen; Chen, Jianfeng; Wang, Guoquan; Liu, Hui

doi:10.1016/j.polymdegradstab.2004.08.013

Cited by 89 publications

(39 citation statements)

References 12 publications

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“…Amphiphilic copolymers intercalate organo-modified tactoids, hence increasing the d-spacing and decreasing the attraction between the silicate layers. This facilitates the exfoliation of highly anisomeric layers that enhances the properties of nanocomposites [12]. In the present study, the effects of organic peroxides on the morphology, as well as thermal and tensile properties, of the nanocomposites have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Effect of organic peroxides on the morphological, thermal and tensile properties of EVA-organoclay nanocomposites

Mishra¹,

Luyt²

2008

Express Polym. Lett.

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Abstract. Nanocomposites were prepared using an ethylene vinyl acetate copolymer (EVA) and organically modified Cloisite ® 93A clay in the absence and presence of dicumyl peroxide (DCP) and dibenzyl peroxide (DBP) as cross-linking agents. The results clearly show differences in the EVA-clay morphology of nanocomposites prepared in the absence of organic peroxides, and of those prepared in the presence of respectively DCP and DBP. It seems as if DCP may initiate grafting between the polymer and the clay, which results in an exfoliated morphology. The presence of clay seems to inhibit the initiation of EVA crosslinking by the DBP free radicals. These free radicals probably initiate hydroxylated edge-edge interaction between the clay layers, which gives rise to a flocculated morphology and reduced polymer-clay interaction. There is a good correlation between these morphologies and the thermal stabilities and total crystallinities of the nanocomposites. Clay incorporation and peroxide treatment did not significantly change the tensile properties.

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Section: Introductionmentioning

confidence: 99%

Effect of organic peroxides on the morphological, thermal and tensile properties of EVA-organoclay nanocomposites

Mishra¹,

Luyt²

2008

Express Polym. Lett.

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“…High concentrations of halogen-free flame-retardants starting from 20 wt% up to 60 wt% are required to fulfill the parameters and classifications demanded by industry. Especially the very high amounts of metal hydroxides Al(OH)3 and Mg(OH)2 (40 wt% to 60 wt%) often alter the mechanical properties of the composites, rendering them brittle by deteriorating the elongation at break, accompanied by impairing both impact strength and tensile strength [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Flame-Retardancy Properties of Intumescent Ammonium Poly(Phosphate) and Mineral Filler Magnesium Hydroxide in Combination with Graphene

et al. 2014

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Thermally reduced graphite oxide (TRGO), containing only four single carbon layers on average, was combined with ammonium polyphosphate (APP) and magnesium hydroxide (MH), respectively, in polypropylene (PP). The nanoparticle's influence on different flame-retarding systems and possible synergisms in pyrolysis, reaction to small flame, fire behavior and mechanical properties were determined. TRGO has a positive effect on the yield stress, which is decreased by both flame-retardants and acts as a synergist with regard to Young's modulus. The applicability and effects of TRGO as an adjuvant in combination with conventional flame-retardants depends strongly on the particular flame-retardancy mechanism. In the intumescent system, even small concentrations of TRGO change the viscosity of the pyrolysing melt crucially. In case of oxygen index (OI) and UL 94 test, the addition of increasing amounts of TRGO to PP/APP had a negative impact on the oxygen index and the UL 94 classification. Nevertheless, systems with only low amounts (≤1 wt%) of TRGO achieved V-0 classification in the UL 94 test and high oxygen indices (>31 vol%). TRGO strengthens the residue structure of MH and therefore functions as a strong synergist in terms of OI and UL 94 classification (from HB to V-0).

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“…The concept of synergism is used to optimize the flame retardant formulations of two or more additives [8]. A combining effect of several additives was found to have a synergistic effect also in the case of vinyl acetate based composites [18]. Synergistic effect of aluminium hydroxide/melamine and novolac resin for polyoxymethylene (POM) was investigated by Wang et al [19].…”

Section: Introductionmentioning

confidence: 99%

Influence of Al(OH)₃ nanoparticles on the mechanical and fire resistance properties of poly(methyl methacrylate) nanocomposites

Bunderšek¹,

Japelj²,

Mušič³

et al. 2014

Polymer Composites

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One of the drawbacks of poly(methyl methacrylate) (PMMA) is its flammability. This limits its use in many areas, particularly in constructions. Although there are several fire retardants commercially available, certain disadvantages remain. Introduction of fire retardants into PMMA can change the mechanical properties and transparency can be significantly reduced. Our attention in this study was focused on aluminium trihydroxide (ATH) nanoparticles as the filler for PMMA. To achieve better compatibility and avoid the agglomeration of nanoparticles, 2‐hydroxyethyl methacrylate was used as a co‐monomer for nanocomposite preparation. The characteristics of sheets made with ATH nanoparticles were compared to standard PMMA sheets prepared without additives. Better thermal properties and impact hardness were observed, the speed of burning was significantly lower, while complete transparency of the material was retained. POLYM. COMPOS., 37:1659–1666, 2016. © 2014 Society of Plastics Engineers

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Investigation of interfacial modification for flame retardant ethylene vinyl acetate copolymer/alumina trihydrate nanocomposites

Cited by 89 publications

References 12 publications

Effect of organic peroxides on the morphological, thermal and tensile properties of EVA-organoclay nanocomposites

Effect of organic peroxides on the morphological, thermal and tensile properties of EVA-organoclay nanocomposites

Flame-Retardancy Properties of Intumescent Ammonium Poly(Phosphate) and Mineral Filler Magnesium Hydroxide in Combination with Graphene

Influence of Al(OH)₃ nanoparticles on the mechanical and fire resistance properties of poly(methyl methacrylate) nanocomposites

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Investigation of interfacial modification for flame retardant ethylene vinyl acetate copolymer/alumina trihydrate nanocomposites

Cited by 89 publications

References 12 publications

Effect of organic peroxides on the morphological, thermal and tensile properties of EVA-organoclay nanocomposites

Effect of organic peroxides on the morphological, thermal and tensile properties of EVA-organoclay nanocomposites

Flame-Retardancy Properties of Intumescent Ammonium Poly(Phosphate) and Mineral Filler Magnesium Hydroxide in Combination with Graphene

Influence of Al(OH)3 nanoparticles on the mechanical and fire resistance properties of poly(methyl methacrylate) nanocomposites

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Influence of Al(OH)₃ nanoparticles on the mechanical and fire resistance properties of poly(methyl methacrylate) nanocomposites