Abstract
A novel combination of depth-sensing nano-indentation, micro-indentation and micro-FTIR techniques is employed towards understanding the durability of coating layers used on engineering thermoplastics upon exposure to harsh weathering environments. This combination of techniques enables study of changes in surface-to-bulk properties in the clearcoat-substrate system upon weathering; typically observed as a degradation starting from the surface and then proceeding inwards to the bulk of the material. Nano-indentation measurements carried out to understand the mechanical properties of the coating layer provide insights into the changes in hardness and modulus upon prolonged weathering exposure. Depth-sensing micro-indentation and micro-FTIR spectroscopy studies performed to evaluate mechanical performance and chemical changes, respectively, explain the influence of the substrate on the coating layer, especially at the interface upon weathering. This unique combination of depth-sensing indentation and micro-FTIR spectroscopy has led to an understanding of the properties of the coating layer and the substrate individually as well as an integral system as a function of weathering exposure time. Finally, the physico-chemical properties of the coating and substrate are linked to performance prediction, enabling optimization of coating-substrate combinations.
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References
B. Claudé, L. Gonon, V. Verney and J.L. Gardette, Polymer Testing, 20, 771 (2001)
M.E. Nichols, J.L. Gerlock, C.A. Smith and C.A. Darr, Progress in Organic Coatings, 35, 153 (1999)
N. Tahmassebi and S. Moradian, Polymer Degradation and Stability, 83, 405 (2004).
W.C. Oliver and G.M. Pharr, J. Mat. Res., 19, 3 (2004).
S. Etienne-Calas, A. Duri and P. Etienne, J. Non-Crystalline Solids, 344, 60–65 (2004)
C.M. Chan, G.C. Cao, H. Fong, T. Robinson and N. Nelson, J. Mat. Res., 15, 14 (1999)
S. Roche, S. Pavan, J.L. Loubet, P. Barbeau and B. Magny, Progress in Organic Coatings, 47, 37 (2003).
K. Adamsons, Progress in Organic Coatings, 45, 69 (2002)
A.C. Tavares, J.V. Gulmine, C.M. Lepienski and L. Akcelrud, Polymer Degradation and Stability, 81, 367 (2003)
M. Osterhold and P. Glöckner, Progress in Organic Coatings, 41, 177 (2001)
W.C. Oliver and G.M. Pharr, J. Mat. Res., 4, 1564 (1992)
J. Mencik, D. Munz, E.R. Weppelmann and M.V. Swan, J. Mater. Res., 12, 2475 (1997)
S. Brunner, P. Richner, U. Müller and O. Guseva, Polymer Testing, 24, 25 (2005).
S. Suresh and A. Giannakopoulos, Acta Mater, 46, 5755 (1998)
C.A. Taylor, M.F. Wayne and W.K.S. Chiu, Thin Solid Films, 429, 190 (2003)
N. Panich and Y. Sun, Surface and Coatings Technology, 182, 342 (2004)
G.N. Peggs and I.C. Leigh, Recommended Procedure for Micro-indentation Vicker’s hardness test, Report MOM 62, UK, National Physical Laboratory (1982)
Z.H. Hu, “Mechanical characterization of coatings and composites – depth sensing indentation and finite element modeling” (Doctoral dissertation, Royal Institute of Technology, Sweden, 2004).
B. Mailhot, P. Bussière, A. Rivaton, S. Morlat-Thérias and J. Gardette, Macromolecular Rapid Communications, 25, 436 (2004)
R.M. Silverstein, G.C. Bassler and T.C. Morril, “Spectrometric identification of organic compounds”, John Wiley & Sons (1981).
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Gupta, S., Lohmeijer, J., Sebastian, S. et al. Micro/Nano Indentation and Micro-FTIR Spectroscopy Study of Weathering of Coated Engineering Thermoplastics. MRS Online Proceedings Library 875, 22 (2005). https://doi.org/10.1557/PROC-875-O2.2
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DOI: https://doi.org/10.1557/PROC-875-O2.2