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Kurokawa, Y.; Yasuda, H. K.; Kashiwagi, Makoto; Oyo, A.

doi:10.1023/a:1018526131023

Cited by 129 publications

(62 citation statements)

References 10 publications

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“…But because of its extremely non-polar molecular structure, the homogeneous dispersion of layered clay within PP matrix is rather difficult to achieve. Literature has some studies regarding the preparation of PP-organoclay nanocomposites having a mixture between intercalated and partially exfoliated structures [12][13]. Moreover, although some benefits are gained with these structures, decrease in tensile ductility of the resultant nanocomposites especially at low temperatures was tried to be overcome via poly(ethylene-co-octene) (PEOc) copolymer addition for forming rubber toughened PP [14].…”

Section: Introductionmentioning

confidence: 99%

Weld line behaviour of exfoliated and toughened polypropylene layered silica nanocomposites

et al. 2011

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Exfoliated and toughened polypropylene nanocomposites prepared by an introduction of a rubber in the form of compatibilizer toughener: ethylene propylene diene based rubber grafted with maleic anhydride (EPDM-g-MAH) were studied in terms of weld line properties and morphology. Effects of addition of rubber and nanolayer on weld line strength under tensile loading condition of polypropylene matrix were investigated. Data showed that in the absence of either EPDM or nanolayers, a sharp decrease in weld line strength cannot be avoided whereas in the presence of each in optimum ratio, the drastic increase in both toughness and weld line strength values can be easily reached. The beneficial effect is believed to come from the selective placing of nanolayers around the rubber droplets and making them smaller in size which contributes to diffused weld line regions with high mechanical strength.

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Section: Introductionmentioning

confidence: 99%

Weld line behaviour of exfoliated and toughened polypropylene layered silica nanocomposites

et al. 2011

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“…The bulk of nanocomposite literature (Biswas et al [1], Vaia et al [2], Tjong et al [3], Kojima et al [4], Lagaly [5], Wang et al [6], Fong et al [7], Chen [8], Manias et al [9], Alexandre et al [10], Tabtiang et al [11], Ichazo et al [12], Gonzalez Montiel A et al [13], Vaia et al [14], LeBaron et al [15], Liu et al [16], Dennis et al [17], Kurokawa et al [18]) indicate that increased strength, or elastic modulus, considerably decreases strain to failure and ductility. In PE, this is further complicated by the nonpolar nature of PE, requiring the use of bridge molecules between the PE and the MLS.…”

Section: Introductionmentioning

confidence: 99%

Thermal stability, mechanical and adsorption resistant properties of HDPE/PEG/Clay nanocomposites on exposure to electron beam

et al. 2008

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Abstract:The Influence of electron beam on behaviors of high density polyethylene/poly(ethylene glycol)/organoclay nanocomposites has been studied. Nanocomposite compounds were prepared by melt intercalation method. X-ray diffraction (XRD) and transition electron microscopy (TEM) revealed the combination of nanocomposite morphology. Thermal and mechanical properties of nanocomposites were studied by using Thermogravimetric analysis (TGA), Young's modulus, tensile strength and hardness tests. The results show that at 500 KGy dose of irradiation the Young's modulus and tensile strength values have been enhanced in comparison with pure blend by cross-linking and the surface hardness of samples raises by increasing the clay content The samples with the clay content of 5 wt% in the matrix with 500KGy dose of irradiation have shown satisfactory thermal resistance. The irradiation at high levels has degraded the nanocomposites and an optimum dose must be employed to enhance their properties. The presence of poly(ethylene glycol) as a compatibilizer has improved the dispersion of clay layers into the matrix and has enhanced the mechanical properties and thermal resistance of nanocomposites. The presence of the clay in the matrix has increased the adsorption amount of xylene and toluene into the bulk of nanocomposites and the irradiation has decreased this capacity by the dose level.

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“…In comparison with neat polymers and microparticulate composites, these materials have been reported to exhibit markedly improved properties, including modulus, strength, barrier performance, solvent and heat resistance, and optical transparency. [1][2][3] Furthermore, these improvements are achieved at low concentrations of the inorganic components (1-10 wt %); this contrasts strongly with conventional filled polymers, which generally require high loadings within the range of 25-40 wt %. In this context, the nanocomposites are much lighter in weight and are more easily processed.…”

Section: Introductionmentioning

confidence: 99%

Interfacial effects in polypropylene–silica nanocomposites

Rong¹,

Zhang²,

Pan³

et al. 2004

J of Applied Polymer Sci

106

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Grafted inorganic nanoparticles can greatly improve the mechanical performance of polymers. To examine the effects of the interfacial characteristics generated by the grafting polymer bonded to nanoparticle surfaces, we chemically grafted nano-silica with different polymers and then melt-mixed it with polypropylene (PP). We extracted the homopolymers produced during the graft polymerization from the grafted products before the composites were manufactured to get rid of the side effects of the nongrafting polymers. We tailored the interfacial interaction between the grafted nano-SiO 2 and PP matrix by changing the amount of the grafting polymers on the nanoparticles, that is, the grafting percentage. Mechanical tests indicated that all the composites incorporated with grafted nano-SiO 2 particles possessed much higher impact strength than untreated SiO 2 /PP composites and neat PP. The greatest contribution of the particles was made at a low grafting percentage. Tensile measurements showed that the treated nanoparticles could provide PP with stiffening, strengthening, and toughening effects at a rather low filler content (typically 0.8 vol %) because of the enhanced interfacial adhesion resulting from molecular entanglement and interdiffusion between the grating polymers on the nanoparticles and matrix macromolecules. The presence of grafting polymers on the nanoparticles provided the composites with a tailorable interphase. The tensile performance of the composites was sensitive to the nature of the grafting polymers. Basically, a hard interface was beneficial to stress transfer, whereas a soft one hindered the development of cavities in the matrix.

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Cited by 129 publications

References 10 publications

Weld line behaviour of exfoliated and toughened polypropylene layered silica nanocomposites

Weld line behaviour of exfoliated and toughened polypropylene layered silica nanocomposites

Thermal stability, mechanical and adsorption resistant properties of HDPE/PEG/Clay nanocomposites on exposure to electron beam

Interfacial effects in polypropylene–silica nanocomposites

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