Abstract
Epoxy resins are utilized extensively in coatings, paints, adhesives, electronics, and composites due to a combination of processability, stability, and property tunability. Over the past several decades, substantial research has focused on manipulating the mechanical properties of epoxy resins via control of the polymer structure and chemistry and the incorporation of various additives. While the quasi-static behavior of these systems has been thoroughly investigated, minimal research has investigated high rate mechanical response. This presentation will highlight the rate dependent behavior of model epoxy resins as a function of the monomer chemistry, chain structure, and resin morphology. The mechanisms for improving high rate energy dissipation in bulk epoxy resins are being translated to surface modification approaches that can be exploited to tune the mechanical behavior of epoxy-substrate interfacial regions. The interfacial chemistry and structure is being characterized utilizing the combination of synchrotron based X-ray Photoelectron Spectroscopy and Near Edge X-ray Absorption Fine Structure, and correlated with characterization of rate dependent adhesive performance.
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Acknowledgements
This work was performed at the US Army Research Labs. A.B. Schoch and D. Knorr were funded by ARL through a contract with the Oak Ridge Institute for Science and Education (ORISE). Certain commercial equipment and materials are identified in this paper in order to specify adequately the experimental procedure. In no case does such identification imply recommendations by the Army Research Laboratory or National Institute of Standards and Technology nor does it imply that the material or equipment identified is necessarily the best available for this purpose.
The authors would also like to thank Cherno Jaye for his assistance with the NEXAFS instrumentation on the NSLS at Brookhaven National Laboratory. Uncertainty in the NEXAFS spectra for these samples is estimated to be ±5% relative to the peak intensity or area value. Multiple measurements on the same sample exhibited similar uncertainty.
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© 2013 The Society for Experimental Mechanics, Inc.
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Knorr, D., Schoch, A., Lenhart, J.L., Fischer, D. (2013). Rate Dependent Response of Crosslinked Epoxy Networks. In: Chalivendra, V., Song, B., Casem, D. (eds) Dynamic Behavior of Materials, Volume 1. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4238-7_1
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DOI: https://doi.org/10.1007/978-1-4614-4238-7_1
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