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Effect of Annealing Condition and Composition on the Scratch Behavior of Fluorinated Coatings

Published

Author(s)

Li Piin Sung, Aaron M. Forster, K Wood

Abstract

Fluorinated and acrylic coatings are commonly used as binders for exterior coatings because of their excellent resistance to UV radiation and many corrosive chemical agents. It is known that the fluorinated component of the coating usually has a lower glass transition temperature and easily forms a crystalline structure in the final product depending upon the blend composition and sample annealing conditions. The resulting surface may be rough/soft or smooth/brittle, making the evaluation of the scratch resistance and fracture behavior challenging. In this study, we investigate the effect of blend composition and annealing (slow and fast cooling) on the surface mechanical properties and scratch behavior of a poly(vinylidene fluoride)/poly(methyl methacrylate-co-ethyl acrylate) PVDF/P(MMA-co-EA) coating. Instrumented indentation was used to measure the surface elastic modulus and hardness, and also served as a single-probe scratch testing instrument. The scratch results, in terms of the elastic–plastic transition and deformation profiles obtained by laser scanning confocal microscopy (LSCM), were correlated to the surface mechanical properties and relevant bulk material properties such as glass transition temperature to understand the overall scratch behavior of the PVDF/P(MMA-co-EA) coatings.
Conference Dates
October 15-16, 2008
Conference Location
Chicago, IL
Conference Title
FCST-NPCA FutureCoat! 2008 Conference Porceeding

Keywords

elastic modulus, fluoropolymer, glass transition temperature, laser scanning confocal microscopy, instrumented indentation, surface morphology, scratch behavior

Citation

Sung, L. , Forster, A. and Wood, K. (2008), Effect of Annealing Condition and Composition on the Scratch Behavior of Fluorinated Coatings, FCST-NPCA FutureCoat! 2008 Conference Porceeding, Chicago, IL (Accessed June 23, 2024)

Issues

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Created September 24, 2008, Updated February 19, 2017