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Nano Scratching of Clear Coats and Relation to Mechanical Material Properties

Published online by Cambridge University Press:  01 February 2011

Rolf Nothhelfer-Richter ,
Eugen Klinke  and
Claus D. Eisenbach
Rolf Nothhelfer-Richter
Affiliation:
Forschungsinstitut für Pigmente und Lacke e.V. Allmandring 37, D-70569 Stuttgart, Germany
Eugen Klinke
Affiliation:
Forschungsinstitut für Pigmente und Lacke e.V. Allmandring 37, D-70569 Stuttgart, Germany
Claus D. Eisenbach
Affiliation:
Forschungsinstitut für Pigmente und Lacke e.V. Allmandring 37, D-70569 Stuttgart, Germany Universität Stuttgart, Institut für Angewandte Makromolekulare Chemie Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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Abstract

The nano single scratch experiment has been proven to be a suitable method to evaluate the scratch resistance of a coating. Single scratch damage and its recovery have been studied for a variety of clear coats under dry as well as wet conditions; these investigations were complemented by multi-scratch tests. Bulk mechanical materials properties of free standing films of the clear coats were determined by tensile tests and dynamic mechanical analysis (DMA). It was found that the recovery of the scratch groove is inversely related to the maximum value of the loss tangent (tan δ) as obtained from DMA analysis. The results of our comparative experiments and implications for the evaluation of the scratch resistance of organic coatings will be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 841: Symposium R – Fundamentals of Nanoindentation and Nanotribology III , 2004 , R8.3
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1. Nothhelfer-Richter, R., Klinke, E., Eisenbach, C.D. and Osterhold, M., in “Neue Entwicklungen zur Qualitätsprüfung in der Lackiertechnik“, DFO, Münster 2002, 81–86.Google Scholar
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5. Nothhelfer-Richter, R., Klinke, E., Kordisch, M. and Eisenbach, C.D., 7th Nürnberg Congress, Vol. I, 359–367 (2003).Google Scholar