Time dependence of the indentation behavior of hybrid coatings

Mammeri, Fayna; Bourhis, E. Le; Rozes, Laurence; Sánchez, Clément; Huignard, Arnaud; Lefevre, D.

doi:10.1016/j.jnoncrysol.2004.08.107

Cited by 17 publications

(14 citation statements)

References 13 publications

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“…The 29 Si NMR experiments recorded in solution of the functionalized PMMA exhibit a single peak at −47 ppm assigned to T 0 units, allowing us to confirm the conservation of Si(OEt) 3 groups of the coupling agent during the polymerisation reaction: they are neither condensed nor hydrolyzed. Consequently, the triethoxysilane functional groups are hydrolytically stable and the polymer does not cross-link upon exposure to moisture.…”

Section: Description Of the Layersmentioning

confidence: 68%

“…29 Particularly, we showed that the relaxation time was a pertinent parameter to predict the time dependence (Fig. 5).…”

Section: Time Dependence Of the Indentation Behaviour Of Hybrid Coatingsmentioning

confidence: 89%

“…29 Si sites will be labelled with the conventional T n and Q n notations. T n refers to trifunctional Si(OEt) 3 units and Q n to tetrafunctional Si(OEt) 4 units, n is the number of bridging O atoms surrounding one Si.…”

Section: Structural Characterizationsmentioning

confidence: 99%

“…T n refers to trifunctional Si(OEt) 3 units and Q n to tetrafunctional Si(OEt) 4 units, n is the number of bridging O atoms surrounding one Si. 29 Si CP MAS solid-state NMR data were recorded on a AV300 Brucker spectrometer (59.62 MHz) using 7 mm diameter zircona rotors at a spinning frequency of 4 kHz.…”

Section: Structural Characterizationsmentioning

confidence: 99%

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Elaboration and mechanical characterization of nanocomposites thin films

Mammeri

Bourhis

Rozes

et al. 2006

Journal of the European Ceramic Society

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Section: Description Of the Layersmentioning

confidence: 68%

“…29 Particularly, we showed that the relaxation time was a pertinent parameter to predict the time dependence (Fig. 5).…”

Section: Time Dependence Of the Indentation Behaviour Of Hybrid Coatingsmentioning

confidence: 89%

Section: Structural Characterizationsmentioning

confidence: 99%

Section: Structural Characterizationsmentioning

confidence: 99%

See 2 more Smart Citations

Elaboration and mechanical characterization of nanocomposites thin films

Mammeri

Bourhis

Rozes

et al. 2006

Journal of the European Ceramic Society

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“…6 This gives confidence in the other mechanical properties derived from the data using the VEP model. 16,25 The VEP calculated hardness (true hardness) data were much greater than those obtained from direct tests. This is significant since the model was derived for thermoplastic polymers or composites with low filler loading and has not been applied to highly filled systems.…”

Section: Mechanical Properties Derived From the Vep Modelmentioning

confidence: 86%

Time-dependent nanoindentation behavior of high elastic modulus dental resin composites

Wang

Lloyd

2010

J. Mater. Res.

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Nanoindentation and the viscous-elastic-plastic (VEP) model developed by Oyen and Cook for lightly filled thermoplastic polymer composites were used to characterize the elastic modulus, hardness, and viscoelastic response of a new high elastic modulus dental resin composite. The VEP model was used because loading rate studies indicated a viscous component in the loading/unloading response of our highly filled, thermosetting acrylic resin composites. Increasing the volume fraction of our high modulus filler increased the elastic modulus and hardness and decreased the viscous response in our composites. Coupling the filler and resin matrix with a commercial coupling agent like Metaltite or MPTMS (3-methacryloxypropyltrimethoxysilane) that ionically bonds to the filler and covalently bonds to the matrix decreases the viscous response and increases the hardness of the composite. The coupling agents did not affect the elastic modulus. The ability of the VEP model to predict load-displacement trajectories and the correlation of the elastic modulus and hardness values determined from the VEP model with those from the direct continuous stiffness measurement mode nanoindentation measurements indicate that the VEP model can be extended to highly filled, thermosetting systems. This is valuable since the potential to predict elastic, plastic, and viscous contributions to behavior should be valuable in the design and understanding of future highly filled resin composite systems.

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2007

Glass

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Time dependence of the indentation behavior of hybrid coatings

Cited by 17 publications

References 13 publications

Elaboration and mechanical characterization of nanocomposites thin films

Elaboration and mechanical characterization of nanocomposites thin films

Time-dependent nanoindentation behavior of high elastic modulus dental resin composites

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