Relation of impact strength to the microstructure of functionally graded porous structures of acrylonitrile butadiene styrene (ABS) foamed by thermally activated microspheres

Jahwari, Farooq Al; Huang, Yuanhao; Naguib, Hani E.; Lo, Jason

doi:10.1016/j.polymer.2016.06.045

Cited by 29 publications

(13 citation statements)

References 22 publications

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“…Physical blowing agents can be divided into two categories, i.e., inorganic and organic blowing agents. Inorganic blowing agents contain nitrogen, carbon dioxide, water, and air [48,49,50,51]. Organic blowing agents include pentane, hexane, dichloroethane, and Freon [52].…”

Section: Polymer Foaming and Processingmentioning

confidence: 99%

Recent Trends of Foaming in Polymer Processing: A Review

et al. 2019

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Polymer foams have low density, good heat insulation, good sound insulation effects, high specific strength, and high corrosion resistance, and are widely used in civil and industrial applications. In this paper, the classification of polymer foams, principles of the foaming process, types of blowing agents, and raw materials of polymer foams are reviewed. The research progress of various foaming methods and the current problems and possible solutions are discussed in detail.

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Section: Polymer Foaming and Processingmentioning

confidence: 99%

Recent Trends of Foaming in Polymer Processing: A Review

et al. 2019

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“…6 Control of anisotropy can potentially open avenues for optimization of mechanical properties, energy absorption and thermal insulation that would be difficult to achieve in isotropic analogues. [7][8][9] Recent studies to generate anisotropic foams have been relying on non-trivial, multistep fabrication processes [10][11][12][13][14][15][16][17][18][19] ; thus, developing a facile method for synthesizing anisotropic cellular materials would be of tremendous interest.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic cellular structures from semi‐crystalline polymer templates

Kanbargi

Erp

Lesser

2020

Journal of Polymer Science

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We report an investigation to determine the effect of an anisotropic semicrystalline template on the resulting cell morphology of microcellular polymeric foams generated in these materials. Poly(ethylene terephthalate) (PET)-polystyrene (PS) composite foams are prepared by using supercritical carbon dioxide (scCO 2) not only as a foaming agent but also as a transport medium of styrene and initiator into a biaxially-oriented PET templating film. The composite foam so obtained demonstrates a highly interpenetrating network verified by a single Tg of 98 C. Substrate orientation is observed not to dictate the cell formation; however highly anisotropic swelling and a shapetemplating phenomenon is observed, with the most significant dimension change in the thickness of the film. Introducing confinement in the direction of maximum dimension change is found to introduce a highly anisotropic lamellar cell architecture.

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“…Several types of graded foam are produced for functional applications, such as impact strength, acoustic capabilities, energy absorption, etc. These new graded foams (polyurethane foam, acrylonitrile butadiene styrene foam, polyethylene foam, polypropylene foam, polylactic acid foam, and polymethyl methacrylate foam) are investigated in the structure–property relationship [ 56 , 57 , 58 , 59 , 60 , 61 ].…”

Section: Polymer Foaming Processmentioning

confidence: 99%

Recent Progress in Processing Functionally Graded Polymer Foams

2020

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Polymer foams are an important class of engineering material that are finding diverse applications, including as structural parts in automotive industry, insulation in construction, core materials for sandwich composites, and cushioning in mattresses. The vast majority of these manufactured foams are homogeneous with respect to porosity and structural properties. In contrast, while cellular materials are also ubiquitous in nature, nature mostly fabricates heterogeneous foams, e.g., cellulosic plant stems like bamboo, or a human femur bone. Foams with such engineered porosity distribution (graded density structure) have useful property gradients and are referred to as functionally graded foams. Functionally graded polymer foams are one of the key emerging innovations in polymer foam technology. They allow enhancement in properties such as energy absorption, more efficient use of material, and better design for specific applications, such as helmets and tissue restorative scaffolds. Here, following an overview of key processing parameters for polymer foams, we explore recent developments in processing functionally graded polymer foams and their emerging structures and properties. Processes can be as simple as utilizing different surface materials from which the foam forms, to as complex as using microfluidics. We also highlight principal challenges that need addressing in future research, the key one being development of viable generic processes that allow (complete) control and tailoring of porosity distribution on an application-by-application basis.

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Relation of impact strength to the microstructure of functionally graded porous structures of acrylonitrile butadiene styrene (ABS) foamed by thermally activated microspheres

Cited by 29 publications

References 22 publications

Recent Trends of Foaming in Polymer Processing: A Review

Recent Trends of Foaming in Polymer Processing: A Review

Anisotropic cellular structures from semi‐crystalline polymer templates

Recent Progress in Processing Functionally Graded Polymer Foams

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