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Metrology for characterizing scratch resistance of polymer coatings

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Abstract

Current methods for scratch resistance assessment are often based on “relative but not quantitative” types of measurements, such as visual inspection, gloss changes, and changes in gray scale level or lightness. Most results are used for qualitative assessment purposes, which result in the lack of a repeatable and reliable standardized test method for the polymer materials community. To implement a scientifically based standardized test method for quantifying scratch resistance, it is vital to understand the relationships between material mechanical properties, morphology, and appearance (optical properties) of surface and subsurface deformation. In this article, preliminary results from a scratch testing protocol to identify the “onset” of plastic deformation in poly(methyl methacrylate) and poly(propylene) commercial samples are presented. Recent advances in optical scattering measurements to identify the onset of plastic deformation by analyzing specular and off-specular intensities are also presented.

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Authors and Affiliations

  1. Building and Fire Research Laboratory, National Institute of Standards and Technology, 20899-8615, Gaithersburg, MD

    Li-Piin Sung & Peter L. Drzal

  2. Multifunctional Materials Branch, U.S. Army Research Laboratory, 21005-5069, Aberdeen Proving Ground, MD

    Mark R. VanLandingham

  3. Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan, R.O.C.

    Tsun Yen Wu & Shuo-Hung Chang

Authors
  1. Li-Piin Sung
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  2. Peter L. Drzal
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  3. Mark R. VanLandingham
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  4. Tsun Yen Wu
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  5. Shuo-Hung Chang
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Sung, LP., Drzal, P.L., VanLandingham, M.R. et al. Metrology for characterizing scratch resistance of polymer coatings. J Coat Technol Res 2, 583–589 (2005). https://doi.org/10.1007/BF02774587

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