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The Effect of Weathering on Tribological Properties of an Acrylic Melamine Automotive Nanocomposite

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Abstract

Acrylic/melamine clearcoats containing different loads of nano silica were artificially weathered by a xenotester, and their tribological properties after various exposure times were studied. Scratch resistances, in terms of gloss retention, of each weathered coating were assessed by a carwash simulator. Scanning electron and optical microscopes were utilized to observe damages caused by carwash brushes. Micro- and nano-indentation tests were carried out after accelerated weathering tests to investigate changes in hardness as well as viscoelastic properties of coatings. Result of this study showed that the scratch resistance of different coatings decreased during weathering at initial times of weathering, followed by a slight increase at later times of weathering. Initial decrease in scratch resistance was attributed to being roughened of the coatings’ surface which increases friction between carwash brushes and the coating surface. The increased scratch resistance at later times was assigned to increase in hardness and elastic recovery of the coatings. It was also found that incorporation of nanoparticles into acrylic melamine clearcoats led to the formation of ductile-type scratches.

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Authors and Affiliations

  1. Polymer Engineering and Color Technology Department, Amirkabir University of Technology, PO Box 15875-4413, Tehran, Iran

    H. Yari & S. Moradian

  2. Department of Surface Coating and Corrosion, Institute for Color Science and Technology, No 59, Vafamanesh St., Hosainabad Sq., Lavizan, Tehran, Iran

    H. Yari

  3. Color Engineering Group, Azad University of Mahshahr, Mahshahr, Khoozestan, Iran

    N. Tahmasebi

  4. Science and Research Branch, Islamic Azad University, Tehran, Iran

    M. Arefmanesh

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  1. H. Yari
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  2. S. Moradian
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  3. N. Tahmasebi
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  4. M. Arefmanesh
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Correspondence to H. Yari.

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Yari, H., Moradian, S., Tahmasebi, N. et al. The Effect of Weathering on Tribological Properties of an Acrylic Melamine Automotive Nanocomposite. Tribol Lett 46, 123–130 (2012). https://doi.org/10.1007/s11249-012-9928-5

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  • DOI: https://doi.org/10.1007/s11249-012-9928-5

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