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Nanomechanical Properties of UV Degraded TiO2/Epoxy Nanocomposites

Published online by Cambridge University Press:  01 February 2011

Stephanie Scierka ,
Peter L. Drzal ,
Amanda L. Forster  and
Stephanie Svetlik
Stephanie Scierka*
Affiliation:
National Institute of Standards and Technology, Building and Fire Research Laboratory 100 Bureau Drive, Stop 8615, Gaithersburg, MD 20899–8615, U.S.A.
Peter L. Drzal
Affiliation:
National Institute of Standards and Technology, Building and Fire Research Laboratory 100 Bureau Drive, Stop 8615, Gaithersburg, MD 20899–8615, U.S.A.
Amanda L. Forster
Affiliation:
National Institute of Standards and Technology, Building and Fire Research Laboratory 100 Bureau Drive, Stop 8615, Gaithersburg, MD 20899–8615, U.S.A.
Stephanie Svetlik
Affiliation:
National Institute of Standards and Technology, Building and Fire Research Laboratory 100 Bureau Drive, Stop 8615, Gaithersburg, MD 20899–8615, U.S.A.
*
* Please address all correspondence to either [email protected] or [email protected]
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Abstract

Model epoxy nanocomposite thin films containing one of three types of titanium dioxide (TiO2) particles were degraded using an integrating sphere-based ultraviolet weathering chamber. Instrumental Indentation Testing (IIT) was used to measure nanomechanical changes in the surface region of thin films resulting from UV exposure. Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Differential Scanning Calorimetry (DSC) were used to support the mechanical results with chemical and thermal data. The unfilled epoxy was the most photosensitive sample tested, exhibiting the highest rates of chemical oxidation, the largest decrease in the glass transition (Tg), and the greatest increase in elastic modulus with increased exposure. Similar trends were observed in the nanocomposite films, but the rates of change were much lower than the unfilled epoxy and decreased with increasing volume fraction of nanoparticles.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 841: Symposium R – Fundamentals of Nanoindentation and Nanotribology III , 2004 , R5.10
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1. Balfour, J.G., JOCCA-Surface Coatings International 12, 478 (1990).Google Scholar
2. Gesenhues, U., Double Liaison: Physique, Chimie et Economie des Peintures et Adhesifs 479–480, X (1996).Google Scholar
3. Simpson, L.A., Australian OCCA Proceeding and News May, 6 (1983).Google Scholar
4. George, G.A., Materials Forum 19, 145 (1995).Google Scholar
5. VanLandingham, M. R., Villarrubia, J. S., Guthrie, W. F. et al., Macromolecular Symposia 167, 15 (2001).Google Scholar
6. Briscoe, B. J., Fiori, L., and Pelillo, E., Journal of Physics D-Applied Physics 31 (19), 2395 (1998).Google Scholar
7. Li, X. D. and Bhushan, B., Materials Characterization 48 (1), 11 (2002).Google Scholar
8. Van Landingham, M. R., Chang, N.-K., Drzal, P.L. et al., Journal of Polymer Science Part B: Polymer Physics (submitted).Google Scholar
9. Lu, H., Wang, B., Ma, J. et al., Mechanics of Time-Dependent Materials 7 (3–4), 189 (2003).Google Scholar
10. Lucas, B. N., Oliver, W. C., and Swindeman, J. E., presented at the Conference Proceedings Spring MRS Meeting, San Francisco, CA, 1998.Google Scholar
11. White, C.C., VanLandingham, M. R., Drzal, P.L. et al., Journal of Polymer Science Part B: Polymer Physics (submitted).Google Scholar
12. Dilks, A., in Degradation and Stability of Polymers, edited by Jellinek, H.H.G. (Elsevier, Amsterdam, 1983), Vol. 1, pp. 601.Google Scholar
13. Clark, D.T., Pure and Applied Chemistry 57, 941 (1985).Google Scholar
14. Haverkamp, R.G., Siew, D.C.W., and Barton, T.F., Surface and Interface Analysis 33, 330 (2002).Google Scholar
15. Chin, J.W., Byrd, W.E., Embree, E.J. et al., presented at the Service Life Prediction: Methodology and Metrologies, Monterey, CA, 2002.Google Scholar
16. Martin, J.W., Chin, J.W., Byrd, W.E. et al., Polymer Degradation and Stability 63, 297 (1999).Google Scholar
17. Guth, E., Journal of Applied Physics 16, 20 (1945).Google Scholar
18. Smallwood, H., Journal of Applied Physics 15, 758 (1944).Google Scholar
19. Bellenger, V. and Verdu, J., Journal of Applied Polymer Science 30, 363 (1985).Google Scholar
20. Allen, N.S., Edge, M., Ortega, A. et al., Polymer Degradation and Stability 85, 927 (2004).Google Scholar