Effects of Relative Humidity on Photodegradation of Acrylic Melamine Coatings: A Quantitative Study

Published

August 1, 2000

Author(s)

Tinh Nguyen, Jonathan W. Martin, E Byrd, N Embree

Abstract

Service life prediction methodology based on correlating short-term performance with outdoor data is not a fundamentally sound approach because the weather never duplicates itself. Experiments having over 200 different combinations of exposure conditions of UV light, temperature, and relative humidity have been conducted to generate experimental data for validating the reliability-theory approach to predict the service life of polymeric coatings. The UV source was supplied by 1000 W xenon arc solar simulators, and relative humidities (RH) were provided by special-design humidity generators, which controlled RHs in the 0 % to 90 % range to within 3 %. Radiation absorbed in the film and coating degradation were measured by UV-visible and FTIr spectroscopies, respectively. The effects of relative humidity (

Proceedings Title

Proceedings of the American Chemical Society Meeting

Volume

220

Conference Dates

August 1, 2000

Conference Title

American Chemical Society

Pub Type

Conferences

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Keywords

building technology, coatings, degradation, FTIR, moisture, photodegradation, polymer, quantum yield, relative humidity

Citation

Nguyen, T. , Martin, J. , Byrd, E. and Embree, N. (2000), Effects of Relative Humidity on Photodegradation of Acrylic Melamine Coatings: A Quantitative Study, Proceedings of the American Chemical Society Meeting, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860279 (Accessed October 13, 2024)