Effects of nanoparticles on the density reduction and cell morphology of extruded metallocene polyethylene/wood fiber nanocomposites

Guo, Gangjian; Wang, K. H.; Park, C. B.; Kim, Y. S.; Li, G.

doi:10.1002/app.25778

Cited by 66 publications

(57 citation statements)

References 19 publications

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“…This could be because the finest WF enhanced the cell nucleation. A very fine-celled structure, with the majority of cells smaller than 50 lm, and a desired density range of 0.4-0.8 g/cm 3 was successfully obtained. The small-sized WF composites also have a higher complex viscosity, as the small WF particles offer a larger surface area for particle-particle and particlematrix interactions.…”

Section: Discussionmentioning

confidence: 91%

“…1 However, their potential applications have been limited because of their low impact strength and high density compared to natural wood. Foaming WPC by either chemical blowing agents (CBA), [2][3][4][5] physical blowing agents (PBA), [6][7][8][9][10][11] or by stretching, 12,13 can decrease the density, reduce material cost, and improve their mechanical properties such as impact strength and tensile strength. Producing a uniform fine-celled or microcellular structure in WPC has been demonstrated to be extremely effective at improving their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Influence of wood fiber size on extrusion foaming of wood fiber/HDPE composites

Guo

Lee

Rizvi

et al. 2007

J of Applied Polymer Sci

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Foaming of wood fiber/plastic composites (WPC) with a fine-celled structure can offer benefits such as improved ductility and impact strength, lowered material cost, and lowered weight, which can enhance their utility in many applications. Although a great deal of attention is now being focused on these composites in the scientific literature, there are still numerous aspects of WPC processing that need elucidation. In this context, this article investigates the effects of wood fiber (WF) size on fine-celled extrusion foaming of WPC in terms of cell size, cell size distribution, and foam density. The effects of WF size and coupling agent content on the viscosity of WPC are also investigated. The experimental results revealed that the small-sized WF provides a better cell morphology, a smaller cell size, and a better cell uniformity in WPC foams.

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Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Influence of wood fiber size on extrusion foaming of wood fiber/HDPE composites

Guo

Lee

Rizvi

et al. 2007

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

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“…Addition of nanoparticles [e.g., nanoclay and carbon nanotubes (CNTs)] may be one of the ways to decrease cell size and achieve more uniform cells in WPCs. It has been reported that the addition of clay improved the cell morphology of foamed WPCs [7, 8]. However, few publications are available on the effect of multi‐walled carbon nanotubes (MWCNTs) on the foaming behavior of WPCs, and the potential of CNTs as nucleating agents for WPCs has not been fully realized.…”

Section: Introductionmentioning

confidence: 99%

Effects of multi‐walled carbon nanotube functionalization on the morphological and mechanical properties of nanocomposite foams based on poly(vinyl chloride)/(wood flour)/ (multi‐walled carbon nanotubes)

Ghasemi

Farsheh

Masoomi

2012

Vinyl Additive Technology

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Experimental results are presented for nanocomposite foams based on unplasticized poly(vinyl chloride)/(wood flour)/(multi‐wall carbon nanotubes) (PVC/WF/MWCNTs). The nanocomposite samples were prepared in an internal mixer and foamed via a batch processing method using compression molding. Nanoparticles were functionalized by sodium hypochlorite solution, and the functionalization process was monitored by Fourier‐transform infrared spectroscopy. The effects of MWCNTs (both neat and functionalized) and blowing agent concentration on the morphological properties (cell size and cell density) and mechanical properties (tensile and flexural strength) of the foam samples were studied. The results revealed that foam cell sizes decreased and cell densities increased with addition of MWCNTs. The dispersion of nanoparticles in the PVC medium was increased by functionalization, and the morphological properties of the foams containing functionalized nanoparticles were improved. Density of nanocomposite foams decreased more with functionalized MWCNTs as compared to other samples. Chemical blowing agent concentration had no significant effect on sample density. Mechanical properties of the samples were improved by using functionalized MWCNTs in comparison with those of foams without this component. J. VINYL ADDIT. TECHNOL., 18:161–167, 2012. © 2012 Society of Plastics Engineers

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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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Effects of nanoparticles on the density reduction and cell morphology of extruded metallocene polyethylene/wood fiber nanocomposites

Cited by 66 publications

References 19 publications

Influence of wood fiber size on extrusion foaming of wood fiber/HDPE composites

Influence of wood fiber size on extrusion foaming of wood fiber/HDPE composites

Effects of multi‐walled carbon nanotube functionalization on the morphological and mechanical properties of nanocomposite foams based on poly(vinyl chloride)/(wood flour)/ (multi‐walled carbon nanotubes)

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

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