Highlight of a compensation effect between filler morphology and loading on dynamic properties of filled rubbers

Sosson, Franck; Bélec, L.; Chailan, Jean‐François; Carriere, Pascal; Crespy, A.

doi:10.1002/app.31216

Cited by 8 publications

(8 citation statements)

References 57 publications

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“…The equivalent shape factor ( f ) has been considered as a measure of the dispersion state of MWCNT and its reinforcing efficiency. Surprisingly, most of the reported shape factors in the literature based on Eqn (9) for MWCNT filled rubbers have been based on the real volume fraction of MWCNTs with no contribution of the immobilized rubber layer in the composite . As shown in Fig.…”

Section: Resultssupporting

confidence: 56%

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Reinforcing mechanisms of carbon nanotubes and high structure carbon black in natural rubber/styrene-butadiene rubber blend prepared by mechanical mixing − effect of bound rubber

Ahmadi

Shojaei

2015

Polym. Int.

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The reinforcing effect of high structure carbon black (HSCB) and multi‐walled carbon nanotubes (MWCNTs) on natural rubber/styrene‐butadiene rubber blend processed using mechanical mixing was comparatively investigated. In‐depth analysis by dynamic mechanical analysis, the Eggers − Schummer model and Medalia's relationship showed that HSCB aggregates provided large internal pores leading to significant immobilized macromolecules in filled rubber. Additionally, a tubular immobilized rubber layer with a thickness of 8 nm was estimated for the rubber/MWCNT system based on dynamic mechanical analysis data. The mechanical performance of the HSCB filled blend was higher than that of the MWCNT filled blend at the same loading which was correlated to its higher bound rubber content. Both bound rubber content and filler anisotropy were found to govern the overall mechanical properties of rubber/MWCNT composites. Stress softening was correlated with rupture energy suggesting hysteretic failure mechanisms in both MWCNT and HSCB filled rubbers. © 2015 Society of Chemical Industry

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Section: Resultssupporting

confidence: 56%

“…The Guth − Gold − Smallwood model suggested for rod‐like reinforcing particles is more suitable for describing the elastic modulus of MWCNT filled rubber . This model is expressed as follows:

E_{C} = E_{m} ((), 1 prefix+ 0.67 f ϕ_{f} + 1.62 f^{2} {ϕ_{normalf}}^{2})

…”

Section: Resultsmentioning

confidence: 99%

Reinforcing mechanisms of carbon nanotubes and high structure carbon black in natural rubber/styrene-butadiene rubber blend prepared by mechanical mixing − effect of bound rubber

Ahmadi

Shojaei

2015

Polym. Int.

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“…Additionally, some part of the rubber matrix, the occluded rubber, is within the voids of the carbon black particle structure. This occluded rubber is less affected by the applied deformation and contributes to an effective filler volume fraction, which is larger than the actual carbon black volume fraction ,. At very high filler contents, above the percolation threshold, the filler particles are in close proximity and the formed filler–filler network caused an even larger increase in the modulus.…”

Section: Resultsmentioning

confidence: 99%

“…For the additional nonlinear contributions that lead to an increase in I 3/1 (γ 0 = 0.32, φ) different explanations are possible. The occluded rubber is partly shielded from the applied deformation, which reduces the amount of polymer bearing the stresses . Due to the large difference in stiffness between the polymer matrix and the solid filler, these stresses are the highest at the rubber–filler interface,, where the bound rubber forms a glassy layer .…”

Section: Resultsmentioning

confidence: 99%

Fourier-Transform Rheology of Unvulcanized, Carbon Black Filled Styrene Butadiene Rubber

Schwab

Hojdis

Lacayo

et al. 2016

Macromol. Mater. Eng.

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Rubber materials filled with reinforcing fillers display nonlinear rheological behavior at small strain amplitudes below γ0 < 0.1. Nevertheless, rheological data are analyzed mostly in terms of linear parameters, such as shear moduli (G′, G″), which loose their physical meaning in the nonlinear regime. In this work styrene butadiene rubber filled with carbon black (CB) under large amplitude oscillatory shear (LAOS) is analyzed in terms of the nonlinear parameter I3/1. Three different CB grades are used and the filler load is varied between 0 and 70 phr. It is found that I3/1(φ) is most sensitive to changes of the total accessible filler surface area at low strain amplitudes (γ0 = 0.32). The addition of up to 70 phr CB leads to an increase of I3/1(φ) by a factor of more than ten. The influence of the measurement temperature on I3/1 is pronounced for CB levels above the percolation threshold.

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“…The most commonly used test for the measurement of the tan is dynamic mechanical thermal analysis (DMTA), which analyses the viscoelastic properties of organic material like rubber-filled carbon black. [16][17][18][19][20] In addition, a specific vibration test derived from a commonly used test developed for laminated glasses was performed. 21 This method is a modification of an Oberst beam test described in the ASTM E756 standard.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of elastomer into poly(ether ether ketone): an attempt to improve the damping factor

Parpaite

Sosson²,

Sonnier

et al. 2014

High Performance Polymers

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The incorporation of an elastomer phase into a poly(ether ether ketone) (PEEK) matrix was carried out using two different processing methods (melt blending (MB) and dry blending) to improve the damping factor (tan δ) of the composite with a minimal change in the PEEK stiffness. A cross-linked fluoroelastomer (CFE) was carefully chosen according to its high glass transition temperature ( Tα), high thermal stability and high modulus. The blends were characterized by scanning electron microscopy (SEM), dynamic mechanical thermal analysis (DMTA), modified Oberst test, flexural test and pyrolysis combustion flow calorimeter. According to SEM micrographs, an original well-dispersed PEEK-elastomer composite was obtained. The tan δ of the materials was evaluated using DMTA and modified Oberst test. Both techniques indicate that the incorporation of 5–20 wt% of CFE fine powders only slightly increased the tan δ of the material. Moreover, a decrease in flexural modulus and thermal stability of the blends was detected when there was an increase in the CFE content. Even if the properties are not yet significantly improved, it was well ascribed that the MB method was suitable to mix elastomer particles within a PEEK matrix. Poor interfacial adhesion has been identified as the main key parameter, which should be improved in further work.

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Highlight of a compensation effect between filler morphology and loading on dynamic properties of filled rubbers

Cited by 8 publications

References 57 publications

Reinforcing mechanisms of carbon nanotubes and high structure carbon black in natural rubber/styrene-butadiene rubber blend prepared by mechanical mixing − effect of bound rubber

Reinforcing mechanisms of carbon nanotubes and high structure carbon black in natural rubber/styrene-butadiene rubber blend prepared by mechanical mixing − effect of bound rubber

Fourier-Transform Rheology of Unvulcanized, Carbon Black Filled Styrene Butadiene Rubber

Incorporation of elastomer into poly(ether ether ketone): an attempt to improve the damping factor

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