Nano-indentation of polymer–glass interfaces Part I. Experimental and mechanical analysis

Hodzic, A.; Stachurski, Zbigniew; Kim, Jang Kyo

doi:10.1016/s0032-3861(99)00890-3

Cited by 140 publications

(72 citation statements)

References 9 publications

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“…1 [8,9]. A small piece was cut from the specimen that had been subjected to UV exposure, with one side of the piece being the exposed surface, and another side (side A) perpendicular to it.…”

Section: Residual Properties After Uv Exposurementioning

confidence: 99%

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Environmental degradation of epoxy-organoclay nanocomposites due to UV exposure: Part II residual mechanical properties

Woo

Zhu

Leung

et al. 2008

Composites Science and Technology

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The residual mechanical properties of epoxy-organoclay nanocomposites after moisture and UV exposure have been evaluated. The flexural modulus decreased after moisture saturation, with much less extent for the nanocomposite than the neat epoxy. The tensile failure strain was significantly reduced with UV exposure time due to the embrittlement effect, and the addition of organoclay mitigated the failure strain reduction. The elastic modulus varied little with UV exposure time regardless of organoclay, because the modulus was determined by the core material which was unaffected by UV exposure. The microhardness and the modulus of the surface material determined from nanoindentation tests increased after UV exposure, with less extent in the nanocomposite than the neat epoxy due to the thinner embrittled top layer for the nanocomposite. All these observations confirmed the beneficial effects of organoclay in improving the barrier characteristics against UV exposure.

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Section: Residual Properties After Uv Exposurementioning

confidence: 99%

“…Nanoindentation was used to determine the series of material properties across the interface from the UV exposed surface to the bulk material, in a similar manner employed for the fiber-polymer matrix interface region in previous investigations [8,9]. Fig.…”

Section: Nanoindentation Test After Uv Exposurementioning

confidence: 99%

Environmental degradation of epoxy-organoclay nanocomposites due to UV exposure: Part II residual mechanical properties

Woo

Zhu

Leung

et al. 2008

Composites Science and Technology

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“…Figure 1b shows the measured variation of hardness in the interphase in both unaged (virgin) and aged (in water) conditions. 44,45 Once again, one can estimate the thickness of the interphase in these samples from these measurements. The hardness measurements obtained in these studies show significantly larger variance compared to the variance in the modulus measurements, some of which may be attributed to the data analyses protocols employed in these studies (these will be discussed in more detail later).…”

Section: Interfaces and Interphases In Compositesmentioning

confidence: 99%

“…The technique has been applied successfully in multiple studies, [45][46][47][48][49][50] often in combination with the nanoscratch tests. 26,[44][45][46][47]50 The advantage of the nanoscratch tests is that they allow for a more precise identification of the extent of penetration of the interphase region into the matrix. It is generally expected that a smooth gradient in the mechanical properties reduces the stress and/or strain concentrations that occur at the interface, and therefore should have a beneficial impact on the overall strength of the composite.…”

Section: Interfaces and Interphases In Compositesmentioning

confidence: 99%

“…Sharp indentation measurements on glass fiber composite systems showing the change in properties across the interphase: (a) an interface enhanced with a silane treatment to enhance the bonding between the components(fiber and matrix), 26 (b) dry and water-aged samples illustrating the change in the properties in the interphase region with aging. 44,45 Fig. 2.…”

Section: Interfaces and Interphases In Compositesmentioning

confidence: 99%

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Mechanical Characterization of Mesoscale Interfaces Using Indentation Techniques

Kalidindi

Mohan

Rossi

2016

JOM

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Mesoscale interfaces and interphases play a central role in controlling the many macroscale mechanical properties and performance characteristics of structural materials. Modern instrumented indenters present an unprecedented opportunity to measure, reliably and consistently, the local mechanical responses at a multitude of length scales ranging from tens of nanometers to hundreds of microns. When these high-fidelity measurements are combined with rigorous data analyses protocols, it is possible to systematically study the mechanical role of individual mesoscale interfaces and quantify their contributions to the overall mechanical response of the material system. The advantages of these new measurement and analyses protocols as well as the potential for development and implementation of novel high-throughput assays is discussed.

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Dentin

Spencer

Wang

Katz

2006

Wiley Encyclopedia of Biomedical Engineering

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Dentin is the hydrated composite structure that constitutes the body of each tooth, providing both a protective covering for the pulp and serving as a support for the overlying enamel. Enamel, with its exceptionally high mineral content, is a very brittle tissue. Without the support of the more resilient dentin structure, enamel is so brittle that it would fracture when exposed to the forces of mastication. Dentin supports as well as compensates for the brittle nature of the enamel. In contrast to enamel, dentin is a vital tissue containing the cell processes of odontoblasts and neurons. As the odontoblasts can be stimulated to deposit more dentin, this tissue is capable of limited repair. The structure‐property relationships of dentin vary with location, physiological, aging, and disease processes. This chapter will review the composition, structure, and properties of the various types of dentin and their effect on current restorative dentistry procedures.

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Nano-indentation of polymer–glass interfaces Part I. Experimental and mechanical analysis

Cited by 140 publications

References 9 publications

Environmental degradation of epoxy-organoclay nanocomposites due to UV exposure: Part II residual mechanical properties

Environmental degradation of epoxy-organoclay nanocomposites due to UV exposure: Part II residual mechanical properties

Mechanical Characterization of Mesoscale Interfaces Using Indentation Techniques

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