Effect of dispersion state of organoclay on cellular foam structure and mechanical properties of ethylene vinyl acetate copolymer/ethylene‐1‐butenecopolymer/organoclay nanocomposite foams

Park, Keun-Wan; Chowdhury, Subhendu Ray; Park, Cha-Cheol; Kim, Gue‐Hyun

doi:10.1002/app.26003

Cited by 25 publications

(12 citation statements)

References 54 publications

(37 reference statements)

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“…In addition, in the use of nanoparticles for the foaming process, the nanoparticles could also enhance the mechanical properties of various polymer foams. Park et al successfully improved the tensile modulus and strength of EVA/(ethylene‐1‐butene copolymer) blend foams by the combined use of nanoclay and compatibilizer. Xu et al characterized the foaming of EVA by using modified nanoclay as a filler.…”

Section: Introductionmentioning

confidence: 99%

The role of nanofillers on (natural rubber)/(ethylene vinyl acetate)/clay nanocomposite in blending and foaming

Lopattananon

Julyanon

Masa

et al. 2014

Vinyl Additive Technology

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Nanocomposite foams were fabricated from 60/40 wt% ethylene vinyl acetate (EVA)/natural rubber (NR) blends by using azodicarbonamide as a blowing agent. Two different nanofillers (sodium montmorillonite and organoclay) were employed to study their effects on foam properties. The results were also compared with conventional (china clay)‐filled foams. Transmission electron microscopy, X‐ray diffraction, scanning electron microscopy, and three‐dimensional Microfocus X‐ray computed tomography scanning analysis were performed to characterize the EVA/NR blend morphology and foam structures. The results revealed that the nanofiller acted as a blend compatibilizer. Sodium montmorillonite was more effective in compatibilization, generating better phase‐separated EVA/NR blend morphology and improving foam structure. Higher filler loading increased the specific tensile strength of rubber foams. The rubber nanocomposite foam showed superior specific tensile strength to the conventional rubber composite foam. The elastic recovery and compressive strength of the nanocomposite foams decreased with increasing filler content, whereas the opposite trend was observed for the conventional composite foams with china clay. The thermal conductivity measurement indicated that the nanofiller had better beneficial effect on thermal insulation over china clay filler. From the present study, the nanofillers played an important role in obtaining better blend morphology as compatibilizer, rather than the nucleating agent and the nanofiller content of 5 phr (parts by weight per hundred parts of rubber) was recommended for the production of EVA/NR nanocomposite foams. J. VINYL ADDIT. TECHNOL., 21:134–146, 2015. © 2014 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

The role of nanofillers on (natural rubber)/(ethylene vinyl acetate)/clay nanocomposite in blending and foaming

Lopattananon

Julyanon

Masa

et al. 2014

Vinyl Additive Technology

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“…In recent years, nanocomposite technology has emerged as a great frontier of material science due to vast applicability of polymer-layered silicate (clay) nanocomposites. Incorporation of the clay, especially organically modified clay even of very low wt % dramatically improves the desirable properties of the polymer like mechanical (Park et al 2007;Lv and Liu 2007), thermal (Gilman 1999;Yang and Gu 2007), biodegradability (Rana et al 2004;Samal et al 2008) and gas barrier properties (Osman and Atallah 2004;Abreu et al 2007). The organoclay consists of particles of one to a few nanometres thick but hundreds of nanometres long having large aspect ratio (Zhong et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Ultrasound assisted synthesis of PMMA/clay nanocomposites: Study of oxygen permeation and flame retardant properties

2012

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PMMA/clay nanocomposites were synthesized by ultrasound assisted emulsifier-free emulsion polymerization technique. Ultrasound waves of different power and frequencies were applied to enhance the dispersion of the clay layers with polymer matrix. The structural information of the synthesized materials was studied by X-ray diffraction (XRD) and it was revealed that the interlayer spacing increased with clay loading. The magnitude of dispersion of the clay in the polymer matrix was detected by transmission electron microscopy (TEM). The Young's modulus, breaking stress, elongation at break, toughness, yield stress and yield strain of the nanocomposites as a function of different clay concentrations and ultrasonic power were measured. Particle diameter of the nanocomposites was measured by laser diffraction technique. Oxygen permeability of the samples was studied and it was found that the oxygen flow rate was reduced by the combined effect of clay loading and ultrasound. The flame retardant property of the nanocomposites due to clay dispersion was investigated by measurement of limiting oxygen index (LOI).

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“…However, most of these works are about foaming using supercritical fluids, [15][16][17][18][19][20][21][22][23] only a few of them are foaming using chemical foaming agents. [24][25][26][27][28] In our previous study, 29 we prepared biodegradable PCL foams using chemical foaming method and the structure-property relationship of PCL foams were studied. However, the applications of PCL foams are limited by the relatively poor mechanical properties and high production cost of the PCL matrix.…”

Section: Introductionmentioning

confidence: 99%

Study of the biodegradable poly(ε‐caprolactone)/clay nanocomposite foams

Liu

Han

Dong

2009

J of Applied Polymer Sci

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In this article, biodegradable poly(e-caprolactone)/layered silicate nanocomposites were prepared and characterized. The dispersion state of modified clay in PCL matrix and its effect on thermal, rheological and mechanical properties of PCL were studied. The PCL/clay nanocomposites were then foamed using chemical foaming method. Cellular parameters such as mean cell size, cell wall thickness and cell densities of nanocomposite foams with different clay loading were collected. Effect of layered silicate on the structure and mechanical properties of PCL foams were evaluated.

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Effect of dispersion state of organoclay on cellular foam structure and mechanical properties of ethylene vinyl acetate copolymer/ethylene‐1‐butenecopolymer/organoclay nanocomposite foams

Cited by 25 publications

References 54 publications

The role of nanofillers on (natural rubber)/(ethylene vinyl acetate)/clay nanocomposite in blending and foaming

The role of nanofillers on (natural rubber)/(ethylene vinyl acetate)/clay nanocomposite in blending and foaming

Ultrasound assisted synthesis of PMMA/clay nanocomposites: Study of oxygen permeation and flame retardant properties

Study of the biodegradable poly(ε‐caprolactone)/clay nanocomposite foams

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