Correlation between the acoustic and dynamic mechanical properties of natural rubber foam: Effect of foaming temperature

Najib, N. N.; Ariff, Zulkifli Mohamad; Bakar, Abu; Sipaut, Coswald Stephen

doi:10.1016/j.matdes.2010.08.030

Cited by 156 publications

(138 citation statements)

References 29 publications

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“…Higher concentration of BA would lead to higher amount of gas generated and subsequently the increased gas volume would result in decrease in foam density. Similar finding has been reported by Najib et al [6] and Ariff et al [11], where at lower concentration of…”

Section: Relative Foam Densitysupporting

confidence: 92%

“…1. In general the compression stress-strain plots have similar characteristics to that of elastomeric foams studied by other researchers [5][6][7][8]. It was observed the compression stress of the foam decreased with increasing of BA concentration.…”

Section: Effect Of Blowing Agent Concentrationsupporting

confidence: 77%

“…Bending of the cell edges and stretching of the cell faces are the primary mechanisms that control their structural response to mechanical deformation [1][2]. The mechanical behaviour of rubber foam has been discussed widely among the researchers [3][4][5][6][7][8]. Study performed by Sombatsompop [3] showed that the mechanical properties of cellular rubber were greatly affected by crosslink reaction which was affected by the curing process.…”

Section: Introductionmentioning

confidence: 99%

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Deformation behavior of open-cell dry natural rubber foam: Effect of different concentration of blowing agent and compression strain rate

Samsudin

Ariff

Ariffin

2017

AIP Conference Proceedings

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, were investigated by performing compressive deformation at different strains and strain rates. Different concentrations of sodium bicarbonate as a blowing agent (BA) were utilized, from 4 to 16 phr in order to produce foams with range of cell size and morphology. Overall, increasing of blowing agent concentration had significantly changed relative foam density. Compression stress-strain curves of the foams exhibited that the compression behavior was directly correlated to the foam cells morphology and physical density. Pronounced changes were noticed for foams with bigger cells particularly at 4 phr concentration of BA where the compression stress at plateau region was greater compared to those with higher concentration of BA. Cell deformation progressive images confirmed that the foams demonstrated small degree of struts bending at 15% of strain and followed by continuous severe struts bending and elastic buckling up to 50% of strain. Compression test at different strain rates revealed that the strain rate factor only affected the foams with 4 phr of BA by causing immediate increment in the compression stress value when higher strain rate was applied.

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Section: Relative Foam Densitysupporting

confidence: 92%

Section: Effect Of Blowing Agent Concentrationsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

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Deformation behavior of open-cell dry natural rubber foam: Effect of different concentration of blowing agent and compression strain rate

Samsudin

Ariff

Ariffin

2017

AIP Conference Proceedings

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“…On the contrary, the dried form of NR (i.e. dry natural rubber) which is obtained after a centrifugation process and subsequent drying of latex, present more uniform properties and stability with time (Najib et al, 2011). As a foamed material, NR finds numerous applications especially in household comfort elements such as mattresses, cushions and pillows.…”

Section: Introductionmentioning

confidence: 99%

“…Salmazo). (Ariff et al, 2008;Joon-Hyung et al, 2006;Joon-Hyung et al, 2007;Najib et al, 2009;Najib et al, 2011).…”

Section: Introductionunclassified

Influence of the irradiation dose in the cellular structure of natural rubber foams cross-linked by electron beam irradiation

Salmazo

Lopez‐Gil

Ariff

et al. 2016

Industrial Crops and Products

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a b s t r a c tThis work focused on the production of natural rubber foams by cross-linking the polymer matrix using high energy electron beam at different irradiation doses (from 50 to 150 kGy) and foaming it with a chemical blowing agent. The aim was to study how the irradiation dose influenced the cellular structure morphology of the produced foams. This was accomplished by quantifying the evolution of cellular structure parameters, such as cell size and cell density, with respect to foaming time and irradiation dose. The results showed that the foams irradiated at the lowest dose are more prone to suffer cellular structure degeneration, resulting in the formation of bimodal cellular structures, while foams irradiated with the highest dose, exhibited more uniform cellular structure. In the latter case, the nucleation density clearly increased resulting in the formation of foams with homogeneous cellular structures and smaller cell sizes (≈20 m).

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Preparation of microcellular thermoplastic elastomer foams from polystyrene‐b‐ethylene‐butylene‐b‐polystyrene (SEBS) and their blends with polystyrene

Sharudin

Ohshima

2012

J of Applied Polymer Sci

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A microcellular foam was prepared from a thermoplastic elastomer by a batch physical foaming with CO2. Two hydrogenated polystyrene‐b‐polybutadiene‐b‐polystyrene (SEBS) copolymers with different styrene ratios were used as an elastomer basis and blended with polystyrene (PS) to control their rigidity and gas permeability. The end‐blocks of the SEBS form a physical cross‐link and provide a rubber‐like elasticity when cooled. SEBS alone, with its lower styrene content, cannot be physically foamed while retaining a stable‐shape dimension because of its higher gas permeability and lower rigidity. SEBS with higher styrene contents were used, or the PS blend ratio was increased to 80/20 or 50/50, and batch physical foaming experiments were conducted at three temperature levels (60, 100, and 120°C) while the sorption CO2 pressure was maintained at 10 MPa. Increasing the styrene content or blending PS with SEBS increased the storage modulus and decreased the gas permeability. As a result, the shrinkage of the foam was controlled, and stable microcellular elastomer foams could be prepared. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Correlation between the acoustic and dynamic mechanical properties of natural rubber foam: Effect of foaming temperature

Cited by 156 publications

References 29 publications

Deformation behavior of open-cell dry natural rubber foam: Effect of different concentration of blowing agent and compression strain rate

Deformation behavior of open-cell dry natural rubber foam: Effect of different concentration of blowing agent and compression strain rate

Influence of the irradiation dose in the cellular structure of natural rubber foams cross-linked by electron beam irradiation

Preparation of microcellular thermoplastic elastomer foams from polystyrene‐b‐ethylene‐butylene‐b‐polystyrene (SEBS) and their blends with polystyrene

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