Viscoelastic effects on the scratch resistance of polymers: relationship between mechanical properties and scratch properties at various temperatures

Jardret, Vincent; Morel, Pierre

doi:10.1016/j.porgcoat.2003.02.002

Cited by 143 publications

(57 citation statements)

References 11 publications

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“…The coatings keep on ductily deforming under the action of the advancing indenter and this results in an accumulation of material in front of the scratching geometry, which causes the decreasing branch at higher load. The experimental evidence agrees with the mechanisms formerly proposed by Briscoe [19,20] and, later on, by Jardret and Morel [21] for the ductile deformation of bulk polymers during scratch.…”

Section: Analysis Of the Scratch Responsesupporting

confidence: 90%

Scratch resistance of ‘fast-cured’ metal flake powder coatings

Bellisario

Barletta

Ucciardello

2010

Progress in Organic Coatings

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a b s t r a c tThe economy of high quality metal flakes powder coatings process is remarkably influenced by the curing procedure involving two cost and time consuming steps in convective oven. Significant savings can be achieved accelerating the baking process by IR pre-curing the outermost layers of the basecoat and following this with a conventional oven-baking of the whole coating system. In the present investigation, the IR pre-curing process of the basecoat was analyzed by studying the influence of the IR radiation intensity and exposure time on the adhesion strength and scratch resistance of the coating varying the contact load of the scratching indenter.

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Section: Analysis Of the Scratch Responsesupporting

confidence: 90%

Scratch resistance of ‘fast-cured’ metal flake powder coatings

Bellisario

Barletta

Ucciardello

2010

Progress in Organic Coatings

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“…The deformation mechanisms described are similar to those occurring in highdensity polyethylene [1,3,11], except for the kinking mechanism of the lamellae. During scratching, the tangential load is the sum of (1) a compressive yield component in front of the indenter; and (2) a shear yield component underneath the contacting area [7,13,16]. The energy brought about by the tip scratching the materials was dissipated by viscoelastoplastic deformation (Fig.…”

Section: Discussionmentioning

confidence: 99%

Does Texturing of UHMWPE Increase Strength and Toughness?: A Pilot Study

Addiego¹,

Buchheit²,

Ruch³

et al. 2011

Clinical Orthopaedics &Amp; Related Research

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Background Crosslinked UHMWPE as a bearing surface in total joint arthroplasty has higher wear resistance than conventional UHMWPE but lower strength and toughness. To produce crosslinked UHMWPE with improved mechanical properties, the material can be treated before crosslinking by tension to induce molecular alignment (texture). Questions/purposes We asked how (1) the microstructure of UHMWPE evolves when subjected to tension and (2) whether the new microstructure (texture) increases strength and toughness. Methods We analyzed microstructure evolution of UHMWPE by small-and wide-angle xray scattering and scanning electron microscopy. We then developed a method to characterize the local strength and toughness of undeformed and textured UHMWPEs by means of nanoscratch tests along and perpendicular to the specimen axis. In three samples we determined the scratch characteristics in terms of deformation mode, coefficient of friction (l), and viscoelastic recovery (r). Results Before the tensile process, the scratch behavior of UHMWPE was characterized by a l ranging from 0.64 to 0.68, no cracking, and r ranging from 0.58 to 0.60. Microfibrillar morphologic features resulted from the tensile process. The new microstructure had an increased strength (r = 0.78) and decreased toughness (cracking + l = 0.77) perpendicular to the fibril axis and decreased strength (r = 0.53) and increased toughness (no cracking + l = 0.55) parallel to the fibril axis. Conclusions Textured UHMWPE behaves like a fiber composite with high strength and toughness in well-defined directions. However, the effect of crosslinking on these specific properties is unknown and therefore it is important to verify that the properties are retained. If wear resistance of crosslinked-textured UHMWPE is at least as high as that of crosslinked UHMWPE, novel medical devices made of crosslinked-textured UHMWPE could be developed and clinically tested.

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“…Scratch resistance for materials can be highly affected by testing conditions such as load (Krupička et al, 2003;Wong et al, 2004a;Zhang and Li, 2003) scratch velocity (Krupička et al, 2003;Zhang and Li, 2003;Gauthier and Schirrer, 2000) and temperature, where, the effect of polymer softening and loss of the filler-matrix interaction can lead to significant degradation in the mechanical properties of the filled polymers (Gauthier and Schirrer, 2000;Jardret and Morel, 2003;Cao et al, 2011). Material characteristics such as ductility (Browning et al, 2006;Hadal and Misra, 2005), crystallinity (Surampadi et al, 2007;Moghbelli et al, 2008), hardness (Rodriguez et al, 2007;Briscoe et al, 1996) and surface roughness (Wong et al, 2004b) can significantly influence the scratch resistance of polymers.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle type effects on the scratch resistance of polyethylene-based nanocomposites

Alghamdi

2017

Int. j. adv. appl. sci

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The purpose of this paper is to investigate the effect of nanoparticle type on the scratch resistance of polyethylene-based nanocomposites at two ambient temperatures and various scratch velocities. An in-house pre-mix procedure is used to enhance the scratch resistance of polyethylene blend by the addition of three different types of nanoparticles, which are compatible with the host matrix. The results showed a good dispersion of nanoparticles into the host material matrix. The scratch resistance of polyethylene-based nanocomposites is significantly influenced by the type of nanoparticles at both testing temperatures. The addition of low volume fraction (0.5 wt.%) of nanoclay and CNT showed a significant increase in the scratch resistance of nanocomposite material at the highest scratching velocity for both testing temperatures. While, slight effect of the embedding of nanoclay was indicated at low scratch velocity. The addition of 0.5 wt% CB resulted in a reduction in the scratch resistance at all testing parameters.

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Viscoelastic effects on the scratch resistance of polymers: relationship between mechanical properties and scratch properties at various temperatures

Cited by 143 publications

References 11 publications

Scratch resistance of ‘fast-cured’ metal flake powder coatings

Scratch resistance of ‘fast-cured’ metal flake powder coatings

Does Texturing of UHMWPE Increase Strength and Toughness?: A Pilot Study

Nanoparticle type effects on the scratch resistance of polyethylene-based nanocomposites

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