Synthesis of polystyrene–carbon nanofibers nanocomposite foams

Shen, Jiong; Zeng, Changchun; Lee, L. James

doi:10.1016/j.polymer.2005.04.010

Cited by 205 publications

(166 citation statements)

References 34 publications

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“…They concluded that while for intercalated nanocomposites nucleating effect of nanofillers was negligible, for completely exfoliated nanocomposites the cell density reached values two orders of magnitude higher than that obtained for the neat polymer foam. Other interesting study was carried out by Shen et al [15]; they produced nanocomposite foams based on PS filled with different types of nanoparticles: carbon nanofibers (CNFs), single-walled car-bon nanotubes (SWCNTs) and clays. After analyzing the dispersion level of each type of filler, they calculated the nucleation efficiency of each nanomaterial.…”

Section: Introductionmentioning

confidence: 99%

Low density polyethylene/silica nanocomposite foams. Relationship between chemical composition, particle dispersion, cellular structure and physical properties

Laguna‐Gutiérrez

Saiz‐Arroyo²,

Velasco

et al. 2016

European Polymer Journal

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Section: Introductionmentioning

confidence: 99%

Low density polyethylene/silica nanocomposite foams. Relationship between chemical composition, particle dispersion, cellular structure and physical properties

Laguna‐Gutiérrez

Saiz‐Arroyo²,

Velasco

et al. 2016

European Polymer Journal

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“…Thus CNFs satisfy the cost threshold for the automotive industry and many other filler-reinforcement applications. While the applications of CNFs in polymer composites have been extensively reported [19][20][21][22][23][24][25], limited research has been conducted on the application of CNFs in polymeric foams [18,26].…”

Section: Introductionmentioning

confidence: 99%

Nanoscaled Reinforcement of Polystyrene Foams using Carbon Nanofibers

Shen

Han

Lee

2006

Journal of Cellular Plastics

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Carbon nanofibers (CNFs) are used as both the nucleants and the reinforcements for polystyrene (PS) foams in both batch and continuous extrusion processes with CO 2 as the blowing agent. The inclusion of CNFs exhibits substantial impact on the morphology and properties of PS foams. The presence of CNFs results in a decrease in the cell size and an increase in the cell density. Macroscopic strength enhancement of PS foams due to the incorporation of CNFs is experimentally observed. These results are qualitatively explained via a series of nanoscaled observations. Through scanning electron microscopy (SEM), the alignment of CNFs and the polymer-sheathing phenomenon are identified. The protective CNF layers around the cell wall and the substantial polymer-fiber interactions resulted in the enhancement of foam strengths. Thermal properties (heat conductivity, infrared transmission, and thermal expansion coefficient) of the PS foams can also be influenced by CNFs. Intensive shear force exerted by the twin-screw extruder broke the fibers in lengths. The impact of the fiber length on the foam structures (cell size and cell density) is also studied.

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“…2) as a result of MWNT addition can be understood by considering the competing effects of MWNT influence on (1) heterogeneous pore nucleation and (2) nanocomposite viscosity, on the foaming process which consists of pore nucleation, growth and coalescence. The existence of a finely dispersed MWNT phase provides interfaces which reduce the critical pore diameter thereby increase the probability of heterogeneous pore nucleation occurring [20]. Therefore a fine dispersion of MWNT in polymeric composites is desired for achieving a high pore density and the associated advantages.…”

Section: Rheological Properties Of Tpu-mwnt Nanocompositesmentioning

confidence: 99%