Micromechanical properties of polymeric coatings

Yeo, Seung Min; Polycarpou, Andreas A.

doi:10.1016/j.triboint.2012.11.009

Cited by 27 publications

(18 citation statements)

References 16 publications

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“…Comparing the profiles (Figure a and b), between FC plasma‐deposited and Teflon AF‐spin coated samples, a more uniform deformation with depth during scratch is observed in the case of Teflon AF‐spin coated COP samples which is an indication of better adhesion of the coating to the substrate and a more uniform microstructure through the thickness. As reported by Yeo and Polycarpou, the Teflon AF‐spin coated sample can maintain its consistent frictional performance regardless of the removal of material wear with sliding.…”

Section: Resultssupporting

confidence: 65%

“…In addition to this, the slope of the loading curve does not increase smoothly and a slope alterations can be observed at some depths, denoting that the nanostructures are not uniform. This behavior has been discussed in previous work, in the case of polytetrafluoroethylene (PTFE)—and polyetheretherketone (PEEK)—based coating, where the mechanical behavior of the samples was successfully correlated with their microstructure, wear performance, and scanning electron imaging results. Also, as is depicted in Figure 5a and b, the indenter penetrates at approximately the same indentation depth by applying lower loads for treated COP than untreated.…”

Section: Resultsmentioning

confidence: 76%

“…These characteristics explain the narrow error bars of the elastic modulus and hardness of the UT/FC sample. Such uniform and consistent micromechanical properties are expected from materials that also have superior tribological performance …”

Section: Resultsmentioning

confidence: 81%

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Nanoscale Mechanical and Tribological Properties of Plasma Nanotextured COP Surfaces with Hydrophobic Coatings

Dragatogiannis

Koumoulos

Ellinas

et al. 2015

Plasma Process. Polym.

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Cyclo olefin polymer (COP) surfaces, treated in oxygen plasmas under highly anisotropic conditions to favor roughness formation, are coated with thin hydrophobic films to form surfaces of enhanced hydrophobicity. As hydrophobic coatings, plasma-deposited fluorocarbon or spin-coated Teflon thin films are implemented. Nanoindentation and nanoscratch experiments have been employed to elucidate the effect of plasma treatment on the mechanical and tribological performance of the synthesized materials. It is shown that short-time plasma treatment slightly changes mechanical and tribological properties of plasma-nanotextured COP, as compared to untreated. The plasma deposited hydrophobic film on the COP surfaces presents good adhesion and it effectively protects the surfaces, reducing plastic deformation.

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Section: Resultssupporting

confidence: 65%

Section: Resultsmentioning

confidence: 76%

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Nanoscale Mechanical and Tribological Properties of Plasma Nanotextured COP Surfaces with Hydrophobic Coatings

Dragatogiannis

Koumoulos

Ellinas

et al. 2015

Plasma Process. Polym.

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“…PTFE is blended with ATSP to improve the friction behavior of ATSP during sliding [3,14]. Unlike bare metals, blended polymers proved to be promising for unlubricated sliding conditions in automotive air-conditioning compressors, including when they were applied in the form of coatings onto conventional substrates [14][15][16][17][18][19][20].…”

Section: Samplesmentioning

confidence: 99%

The effect of surface roughness on the transfer of polymer films under unlubricated testing conditions

Nunez

Polycarpou

2015

Wear

Self Cite

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“…[ 27,28 ] Despite the high wear resistance resulting from their self‐lubricating properties, these coatings suffer from a limited scratch resistance because of their relatively low hardness. [ 29 ] Another problem is the application of PTFE coating. Usually, fine powdered PTFE is forced into a mold under high pressure and subsequently annealed up to days at higher temperatures to form a homogeneous layer.…”

Section: Introductionmentioning

confidence: 99%

Polysilazane‐Based Coatings with Anti‐Adherent Properties for Easy Release of Plastics and Composites from Metal Molds

Barroso

Döring

Horcher

et al. 2020

Adv Materials Inter

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Polysilazanes are excellent coating materials, because of their self‐crosslinking in air at low temperatures, high chemical and thermal stability, elevated hardness, and excellent adhesion to many different substrates. Therefore, coatings of two chemically different polysilazanes (crosslinked Durazane 1800 (HTTS)/perhydropolysilazane (PHPS)) are deposited by either dip or spray coating and crosslinked at 200 or 300 °C in air to investigate the chemical composition, surface energy, and coating adhesion in dependency on the precursor type and crosslinking temperature. The silazane HTTS possesses a higher amount of nonpolar organic groups resulting in a lower surface free energy. The anti‐adherence properties are investigated by using a phenolic resin via pull‐off adhesion, which is slightly reduced from 13 MPa for uncoated aluminum to less than 10 MPa for HTTS coated substrates. The addition of different amounts of poly(tetrafluoroethylene) (PTFE) particles causes a remarkable reduction of the surface free energy leading to a strongly reduced pull‐off adhesion of less than 4 MPa of the phenolic resin from the HTTS/PTFE coated substrates. The anti‐adherent properties remain even after repeated pull‐off tests. Because of the excellent properties, the HTTS/PTFE coatings are a very suitable system for easy mold release of plastic parts from metal molds and to replace commercial nonstick PTFE coatings.

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Micromechanical properties of polymeric coatings

Cited by 27 publications

References 16 publications

Nanoscale Mechanical and Tribological Properties of Plasma Nanotextured COP Surfaces with Hydrophobic Coatings

Nanoscale Mechanical and Tribological Properties of Plasma Nanotextured COP Surfaces with Hydrophobic Coatings

The effect of surface roughness on the transfer of polymer films under unlubricated testing conditions

Polysilazane‐Based Coatings with Anti‐Adherent Properties for Easy Release of Plastics and Composites from Metal Molds

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