Preparation and Properties of Layered Silicate Nanocomposites Based on Ethylene Vinyl Acetate Copolymers

Alexandre, Michaël; Beyer, Günter; Henrist, Catherine; Cloots, Rudi; Rulmont, A.; Jérôme, Robert; Dubois, Philippe

doi:10.1002/1521-3927(20010501)22:8<643::aid-marc643>3.0.co;2-#

Cited by 221 publications

(147 citation statements)

References 9 publications

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“…Specific mechanical and physical properties are expected when the filler particles are plateletshaped [15,16]. The advantage of composites containing nanoplatelets is mainly the improvement of their mechanical reinforcement properties as well as ''barrier properties'' that are supposed to play a significant role in fire resistance, for lower filler loading than traditional composites [14]. The combination of these two characteristics (morphology and water release), regarding magnesium hydroxide, renders it a good candidate for fire resistance applications.…”

Section: Introductionsupporting

confidence: 75%

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Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution

Henrist

Mathieu

Vogels

et al. 2003

Journal of Crystal Growth

316

213

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Among other applications, magnesium hydroxide is commonly used as a flame-retardant filler in composite materials, as well as a precursor for magnesium oxide refractory ceramic. The microstructure of the powder is of prime importance in both technical applications. The influence of synthesis parameters on the morphological characteristics of magnesium hydroxide nanoparticles precipitated in dilute aqueous medium was studied. Several parameters were envisaged such as chemical nature of the base precipitant, type of counter-ion, temperature and hydrothermal treatment. Special attention was given to the obtaining of platelet-shaped, nanometric and de-agglomerated powders. The powders were characterized in terms of particle size distribution, crystal habits, morphology and ability to be redispersed in water. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption and laser diffusion analyses were used for this purpose. r

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Section: Introductionsupporting

confidence: 75%

“…Many studies have been recently focusing on the development and characterization of new nanocomposites exhibiting anisotropic morphologies [8][9][10][11][12][13][14]. Specific mechanical and physical properties are expected when the filler particles are plateletshaped [15,16].…”

Section: Introductionmentioning

confidence: 99%

Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution

Henrist

Mathieu

Vogels

et al. 2003

Journal of Crystal Growth

316

213

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“…The silicate layers are thought to oppose an effective barrier to the permeation of oxygen and combustion gas (Alexandre et al [1]). A similar thermal stabilization has been recently reported by some of us for nanocomposites based on ethylene-co-vinyl acetate copolymers (EVA) filled with organo-modified montmorillonites (Alexandre et al [9]). Furthermore, it has been found that PCL nanocomposites exhibit remarkable flame retardant properties.…”

Section: Resultsmentioning

confidence: 99%

“…Exfoliation of the silicate layers usually provides the nanocomposite materials with improved properties, such as higher Young's modulus (namely the material stiffness) and storage modulus, higher thermal stability and flame retardancy, and a more efficient gas barrier (Alexandre et al [1]). A wide range of polymeric matrices have been reported to form nanocomposites by melt intercalation, e.g., polystyrene (Vaia et al [2][3][4]), nylon-6 (Liu et al [5]), maleic anhydride grafted polypropylene (Kato et al [6], Kawasumi et al [7] and Hasegawa [8]) , ethylene-vinyl acetate copolymers (Alexandre et al [9]), ... Because of unique properties of polymer miscibility, poly(ε-caprolactone) (PCL) is a thermoplastic worth being modified by nanofillers. Indeed, it is miscible with a large variety of polymers and copolymers, e.g., poly(vinyl chloride), poly(styrene-coacrylonitrile), poly(acrylonitrile-co-butadiene-co-styrene), bisphenol-A polycarbonate, nitrocellulose and cellulose butyrate.…”

Section: Introductionmentioning

confidence: 80%

Poly(η-caprolactone) layered silicate nanocomposites: effect of clay surface modifiers on the melt intercalation process

et al. 2001

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Nanocomposites based on biodegradable poly(ε-caprolactone) (PCL) and layered silicates (montmorillonite) modified by various alkylammonium cations were prepared by melt intercalation. Depending on whether the ammonium cations contain non-functional alkyl chains or chains terminated by carboxylic acid or hydroxyl functions, microcomposites or nanocomposites were recovered as shown by X-ray diffraction and transmission electron microscopy. Mechanical and thermal properties were examined by tensile testing and thermogravimetric analysis. The layered silicate PCL nanocomposites exhibited some improvement of the mechanical properties (higher Young's modulus) and increased thermal stability as well as enhanced flame retardant characteristics as result of a charring effect. This communication aims at reporting that the formation of PCL-based nanocomposites strictly depends on the nature of the ammonium cation and its functionality, but also on the selected synthetic route, i.e. melt intercalation vs. in situ intercalative polymerization. Typically, protonated ω-aminododecanoic acid exchanged montmorillonite allowed to intercalate ε−caprolactone monomer and yielded nanocomposites upon in situ polymerization, whereas they exclusively formed microcomposites when blended with preformed PCL chains. In other words, it is shown that the formation of polymer layered silicate nanocomposites is not straightforward and cannot be predicted since it strongly depends on parameters such as ammonium cation type and functionality together with the production procedure, i.e., melt intercalation, solvent evaporation or in situ polymerization.

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“…One of the most promising applications involves the improvement in flame retardancy properties of polymers added with nanofillers. The possibility to reduce flammability of numerous polymers using nanoclays have been shown by many authors and several mechanisms are proposed [5][6][7][8][9][10][11][12][13][14][15][16][17]. Indeed, nanocomposite systems are a new attractive alternative to conventional commercial flame retardants.…”

Section: Introductionmentioning

confidence: 99%

Poly(ethylene terephthalate)-carbon nanofiber nano composite for fiber spinning; properties and combustion behavior

Alongi¹,

Frache

2010

E-Polymers

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Carbon nanofiber (CNF)-polyethylene terephthalate (PET) blends were previously prepared by melt blending and, subsequently, melt spun in order to obtain nanostructured fibers characterized by high flame retardant properties and resistance to the combustion. The morphological analysis showed that CNFs are homogeneously distributed and finely dispersed within PET matrix. The mechanical properties in tensile testing of the fibers change in the presence of CNFs: the elongation at break increases, whereas the tenacity and the tensile strength decrease. The combustion tests by cone calorimetry reveal a relevant decrease of heat release rate, total heat evolved and total smokes released by the nanocomposites as compared to neat PET.

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Preparation and Properties of Layered Silicate Nanocomposites Based on Ethylene Vinyl Acetate Copolymers

Cited by 221 publications

References 9 publications

Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution

Morphological study of magnesium hydroxide nanoparticles precipitated in dilute aqueous solution

Poly(η-caprolactone) layered silicate nanocomposites: effect of clay surface modifiers on the melt intercalation process

Poly(ethylene terephthalate)-carbon nanofiber nano composite for fiber spinning; properties and combustion behavior

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