New Insight into the Relationship Between Molecular Effects and the Rheological Behavior of Polymer-Thickened Lubricants Under High Pressure

Mary, Charlotte; Philippon, David; Lafarge, Lionel; Laurent, Delphine; Rondelez, F.; Bair, Scott; Vergne, Philippe

doi:10.1007/s11249-013-0214-y

Cited by 32 publications

(38 citation statements)

References 24 publications

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“…The numerical curves are quite consistent with the experimental graphs at 25 and 75 1C (Fig. 5) which agrees with the conclusions of the comparison with the analytical solutions and with the rheological behavior described in [6]. However, the simulations slightly overestimate the film thickness which supposes that the modelled viscosity is overvalued at 251C.…”

Section: Comparisons With Numerical Modelssupporting

confidence: 88%

“…where T g (p) is the glass transition temperature at pressure p, T g (0) the glass transition temperature at atmospheric pressure , η g is the viscosity at the glass transition and C 1 , C 2, A 1 , A 2, B 1 , B 2 are WLF numerical constants for each specific fluid reported in [6]. F (p) is the dimensionless relative thermal expansion of the free volume.…”

Section: Comparisons With Numerical Modelsmentioning

confidence: 99%

“…G, a, n and η 2 were determined by least mean square regressions of the experimental data obtained with a high-pressure Couette rheometer [6]. In Fig.…”

Section: Comparisons With Numerical Modelsmentioning

confidence: 99%

“…Film thicknesses were measured and compared with both analytical expressions and numerical solutions which incorporate the modelled rheological behavior of three polymer-base oil solutions. Another motivation is to reach a better understanding of the tribology for a chosen pair of polymer/solvent from three specific polymers, based on the insights described in [6] into the relationship between the physico-chemistry and the interaction between these polymers and solvents. A final goal lies in the investigation of the thermal effects and of the influence of the slide-to-role ratio (SRR) on film thickness.…”

Section: Introductionmentioning

confidence: 99%

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Bridging high pressure rheology and film-forming capacity of polymer-base oil solutions in EHL

Mary

Philippon

Devaux

et al. 2016

Tribology International

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Section: Comparisons With Numerical Modelssupporting

confidence: 88%

Section: Comparisons With Numerical Modelsmentioning

confidence: 99%

“…G, a, n and η 2 were determined by least mean square regressions of the experimental data obtained with a high-pressure Couette rheometer [6]. In Fig.…”

Section: Comparisons With Numerical Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bridging high pressure rheology and film-forming capacity of polymer-base oil solutions in EHL

Mary

Philippon

Devaux

et al. 2016

Tribology International

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“…This is shown in Fig. 1, where viscosity measurements obtained at 75°C for hydrocracked mineral base oil [20] are reported. In this figure, several VPCs are highlighted with arrows at different pressure conditions.…”

Section: Viscosity-pressure Dependence and Viscositypressure Coefficimentioning

confidence: 84%

Classical EHL Versus Quantitative EHL: A Perspective Part I—Real Viscosity-Pressure Dependence and the Viscosity-Pressure Coefficient for Predicting Film Thickness

Vergne

Bair

2014

Tribol Lett

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That classical elastohydrodynamic lubrication (EHL) is not a quantitative field can be illustrated by its failure to provide a consistent and rigorous definition of the viscosity-pressure coefficient. Indeed, if the pressure dependence of viscosity cannot be accurately described, then the viscosity-pressure coefficient cannot be defined. Classical EHL has employed fictional narratives to justify the pressure dependences that have been utilized. In this context, the purpose of this perspective article is to review specific and real needs from EHL and to show that data and models describing the viscosity-pressure dependence are already available and how they can properly be used. The final aim is to encourage researchers to change their philosophy of classical EHL to a quantitative approach, in which every hypothesis and every result, whether experimental or numerical, would be justified on the basis of acceptable physics.

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SiO₂‑g‑Polyisoprene Particle Brush Reinforced Advanced Elastomer Nanocomposites Prepared via ARGET ATRP

Liu,

Wang,

Zhao

et al. 2024

Adv Funct Materials

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Nanoparticle reinforcement is a general approach toward the strengthening of elastomer nanocomposite in large‐scale applications. Extensive studies and efforts have been contributed to demonstrating the property reinforcement of polymer nanocomposites in relation to matrix‐filler and filler‐filler interaction. Here, a facile synthetic method is creatively reported to synthesize SiO2,15/120‐g‐polyisoprene (SiO2‐g‐PI) particle brushes using atom transfer radical polymerization (ATRP). The dispersion and microstructures of the nanoparticles in the nanocomposites are investigated by morphological characterizations, whereas the reinforcing mechanism is studied through mechanical measurements as well as computational simulation. Remarkably, compared with the cured bulk elastomers and matrix(M)/SiO2 blends, M/particle brushes (PB) exhibit significant improvement in mechanical properties, including tensile strength, elongation at break, modules, and rolling resistance. This elastomer nanocomposites afford a novel prospect for the practical application of next‐generation automobile tires with enhanced performance.

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New Insight into the Relationship Between Molecular Effects and the Rheological Behavior of Polymer-Thickened Lubricants Under High Pressure

Cited by 32 publications

References 24 publications

Bridging high pressure rheology and film-forming capacity of polymer-base oil solutions in EHL

Bridging high pressure rheology and film-forming capacity of polymer-base oil solutions in EHL

Classical EHL Versus Quantitative EHL: A Perspective Part I—Real Viscosity-Pressure Dependence and the Viscosity-Pressure Coefficient for Predicting Film Thickness

SiO₂‑g‑Polyisoprene Particle Brush Reinforced Advanced Elastomer Nanocomposites Prepared via ARGET ATRP

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New Insight into the Relationship Between Molecular Effects and the Rheological Behavior of Polymer-Thickened Lubricants Under High Pressure

Cited by 32 publications

References 24 publications

Bridging high pressure rheology and film-forming capacity of polymer-base oil solutions in EHL

Bridging high pressure rheology and film-forming capacity of polymer-base oil solutions in EHL

Classical EHL Versus Quantitative EHL: A Perspective Part I—Real Viscosity-Pressure Dependence and the Viscosity-Pressure Coefficient for Predicting Film Thickness

SiO2‑g‑Polyisoprene Particle Brush Reinforced Advanced Elastomer Nanocomposites Prepared via ARGET ATRP

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Product

Resources

About

SiO₂‑g‑Polyisoprene Particle Brush Reinforced Advanced Elastomer Nanocomposites Prepared via ARGET ATRP