Surface structure build-up and three-dimensional topography of polyurethane powder coatings

Authors

  • Barbara Pilch-Pitera,

    Corresponding author
    1. Department of Polymer Science, Faculty of Chemistry, Rzeszów University of Technology, Rzeszów 35-959, Poland
    • Department of Polymer Science, Faculty of Chemistry, Rzeszów University of Technology, Rzeszów 35-959, Poland
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  • Ryszard Stagraczyñski

    1. Department of Physics, Faculty of Mathematics and Applied Physics, Rzeszów University of Technology, Rzeszów 35-959, Poland
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Abstract

Non- and polysilsesquioxane-containing polyurethane-based powder coating systems, crosslinked with allophanate bonds containing polyisocyanates were examined. The surface structure built-up of the powder coatings were investigated at different temperatures with a polarized optical microscopy (POM) using reflected light. The three-dimensional surface topography and the values of surface roughness were determined. The surface structure was correlated with the chemical structure of the coatings and macroscopic surface behavior: surface free energy and gloss. These experimental results lead to a better understanding of the development of surface topography and morphology and provide valuable information for the development of new polyurethane powder coating systems. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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