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On the use of the atomic force microscope to monitor physical degradation of polymeric coating surfaces

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Journal of Coatings Technology

Abstract

The atomic force microscope (AFM) was used to monitor changes in surface features of an acrylic melamine coating that was exposed to a variety of conditions. Exposure to ultraviolet (UV) radiation and high relative humidity caused general roughening of the surface and the formation of pits. Further, the damage of the coating surface was much more substantial for exposure to high relative humidity compared to exposure to dry environments. This difference in degradation rates correlated with measurements of chemical degradation determined using infrared spectra that were acquired along with the AFM images.

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References

  1. Climate Research Committee,Natural Climate Variability on Decade-to-Century Time Scales, National Academy of Science Press, Washington, DC, 1995.

    Google Scholar 

  2. Martin, J.W., “A Critical Review of the Role of Field Exposure Experiments in Predicting the Service Life of Coatings,”Durability of Coatings on Plastics, Ryntz, R.A. (Ed.), Hanser, New York, 2000.

    Google Scholar 

  3. Martin, J.W., Nguyen, T., Byrd, E., Dickens, B., and Embree, E., “Relating Laboratory and Outdoor Exposures of Acrylic Melamine Coatings: I. Estimation of Total Absorbed Dosage and Spectral Quantum Yield,”Poly. Degrad. Stab., submitted for publication, 2000.

  4. Bauer, D.R., “Melamine/Formaldehyde Crosslinkers: Characterization, Network Formation and Crosslnk Degradation,”Prog. Org. Coat., 14, No. 3, 193 (1986).

    Article  CAS  Google Scholar 

  5. Bauer, D.R., Gerlock, J.L., and Mielewski, D.F., “Photostabilization and Photodegradation in Organic Coatings Containing a Hindered Amine Light Stabilizer. 7. HALS Effectiveness in Acrylic Melamine Coatings Having Different Free-Radical Formation Rates,”Poly. Degrad. Stab., 36, No. 1, 9 (1992).

    Article  CAS  Google Scholar 

  6. Bauer, D.R. and Mielewski, D.F., “The Role of Humidity in the Photooxidation of Acrylic Melamine Coatings,”Poly. Degrad. Stab., 40, No. 3, 349 (1993).

    Article  CAS  Google Scholar 

  7. Hill, L.W., “Overview of Mechanical Property Changes During Coating Degradation,”Service Life Prediction of Organic Coatings: A Systems Approach, ACS Symposium Series 722, Bauer, D.R. and Martin, J.W. (Eds.), American Chemical Society, Washington, DC, pp. 312–322, 1999.

    Chapter  Google Scholar 

  8. Hill, L.W., Korzeniowski, H.M., Ojunga-Andrew, M., and Wilson, R.C., “Accelerated Clearcoat Weathering Studies by Dynamic-Mechanical Analysis,” Prog. Org. Coat., 24, No. 1–4, 147 (1994).

    Article  CAS  Google Scholar 

  9. Nichols M.E., Gerlock J.L., and Smith C.A., “Rates of Photooxidation Induced Crosslinking and Chain Scission in Thermoset Polymer Coatings,”Poly. Degrad. Stab., 56, No. 1, 81 (1997).

    Article  CAS  Google Scholar 

  10. Nichols M.E., Darr C.A., Smith C.A., Thouless, M.D., and Fischer, E.R., “Fracture Energy of Automotive Clearcoats — I. Experimental Methods and Mechanics,”Poly. Degrad. Stab., 60, No. 2–3, 291 (1998).

    Article  CAS  Google Scholar 

  11. Lee, F., Pourdeyhimi, B., and Adamsons, K., “Analysis of Coatings Appearance and Surface Defects Using Digital Image Capture-Processing-Analysis System,”Service Life Prediction of Organic Coatings: A Systems Approach, ACS Symposium Series 722, Bauer, D.R. and Martin, J.W. (Eds.), American Chemical Society, Washington, DC, pp. 207–232, 1999.

    Chapter  Google Scholar 

  12. Klein, W.H. and Goldberg, B., “Monitoring UVB Spectral Irradiances at Three Latitudes,”Proc. International Solar Energy Society Conference (Vol. 1), 400 (1978).

    Google Scholar 

  13. Prane, J.A., “Introduction to Polymers and Resins,”Federation Series on Coatings Technology, Federation of Societies for Coatings Technology, Philadelphia, PA, 1986.

    Google Scholar 

  14. Rancourt, J.D.,Optical Thin Films User’s Handbook, McGraw-Hill, New York, p. 183, 1987.

    Google Scholar 

  15. Nguyen, T., Martin, J.W., Byrd, E., and Embree, N., “Effects of Relative Humidity on Photodegradation of Acrylic Melamine Coatings: A Quantitative Study,”Proc. American Chemical Society Division of Polymeric Materials: Science and Engineering, American Chemical Society, Washington, DC, 83, 188 (2000).

    Google Scholar 

  16. Martin, J.W., Nguyen, T., Byrd, E., Dickens, B., and Embree, E., “Relating Laboratory and Outdoor Exposures of Acrylic Melamine Coatings: II. Effects of Relative Humidity on Photodegradation, Absorbed Dosage and Apparent Quantum Yields of Acrylic-Melamine Coatings,”Journal of Coatings Technology, submitted for publication, 2001.

  17. Gregorovich, B.V. and Hazan, I., “Environmental Etch Performance, and Scratch and Mar of Automotive Clearcoats,”Prog. Org. Coat., 24, No. 1–4, 131 (1994).

    Article  CAS  Google Scholar 

  18. Holoubka, J.W., Schmitz P.J., and Xu, L.-F., “Acid Etch Resistance of Automotive Clearcoats. I: Laboratory Test Method Development,”Journal of Coatings Technology, 72, No. 901, 77 (2000).

    Article  Google Scholar 

  19. Schmitz, P.J., Holoubka, J.W., and Xu, L.-F., “Mechanism for Environmental Etch of Acrylic Melamine-Based Automotive Clearcoats: Identification of Degradation Products,”Journal of Coatings Technology, 72, No. 904, 39 (2000).

    Article  CAS  Google Scholar 

  20. Bauer, D. R., “Degradation of Organic Coatings. I. Hydrolysis of Melamine Formaldehyde/Acrylic Copolymer Films,”J. Appl. Polym. Sci., 27, No. 10, 3651 (1982).

    Article  CAS  Google Scholar 

  21. Nichols, M.E. and Darr, C.A., “The Effect of Weathering on the Stress Distribution and Mechanical Performance of Automotive Paint Systems,”Service Life Prediction of Organic Coatings: A Systems Approach, ACS Symposium Series 722, Bauer, D.R. and Martin, J.W. (Eds.), American Chemical Society, Washington, DC, pp. 332–353, 1999.

    Chapter  Google Scholar 

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Building Materials Division, 100 Bureau Dr., Stop 8621, Gaithersburg, MD 20899-8621.

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VanLandingham, M.R., Nguyen, T., Byrd, W.E. et al. On the use of the atomic force microscope to monitor physical degradation of polymeric coating surfaces. Journal of Coatings Technology 73, 43–50 (2001). https://doi.org/10.1007/BF02720133

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