Record Display for the EPA National Library Catalog


Main Title Analytical Techniques for Measuring the Effects of Acid Deposition on Coatings on Wood.
Author Balik, C. M. ; Fornes, R. E. ; Gilbert, R. D. ;
CORP Author North Carolina State Univ. at Raleigh.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab.
Publisher Nov 88
Year Published 1988
Report Number EPA-R-814166 ;EPA-R-814121; EPA/600/3-88/044;
Stock Number PB89-127518
Additional Subjects Acid resistance tests ; Coatings ; Measurement ; Photodegradation ; Paints ; Latex ; Sulfur dioxide ; Ultraviolet radiation ; Protective coatings ; Wood ; Assessments ;
Library Call Number Additional Info Location Last
NTIS  PB89-127518 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 60p
Preliminary experiments have been carried out to characterize the potential deleterious effects of acidic deposition on three representative paints: an oil alkyd paint and two acrylic latex formulations. The base polymer latex common to both latex paints was also studied individually. Free films of paint have been exposed to relatively high levels of gaseous SO2 and ultraviolet light, and have been immersed in aqueous SO2 at pH 2.0. Several analytical techniques have been used to assess the resulting chemical and physical changes in the paint films, including sorption and diffusion measurements, attenuated total reflectance infrared spectroscopy, dynamic mechanical analysis, sol-gel analysis, contact angle measurements, differential scanning clorimetry, and electron spin resonance. All techniques show promise for characterizing the early stages of damage to paint films caused by acidic deposition. The major effects noted in the study include leaching of acid-soluble extender components upon immersion in aqueous SO2, and enhanced degradation of the base polymer upon exposure to gaseous SO2, and ultraviolet light.