Analytical techniques for measuring the effects of acid deposition on coatings on wood

Technical Report · Tue Nov 01 04:00:00 EST 1988

OSTI ID:6517274

Balik, C M; Fornes, R E; Gilbert, R D

Preliminary experiments were 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 were exposed to relatively high levels of gaseous SO2 and ultraviolet light, and were immersed in aqueous SO2 at pH 2.0. Several analytical techniques were 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 calorimetry, 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 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.

• Research Organization: North Carolina State Univ., Raleigh (USA)
• OSTI ID: 6517274
• Report Number(s): PB-89-127518/XAB
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID RAIN
ATMOSPHERIC PRECIPITATIONS
CHALCOGENIDES
COATINGS
DEPOSITION
ELASTOMERS
ELECTROMAGNETIC RADIATION
LATEX
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PAINTS
POLYMERS
PROTECTIVE COATINGS
RADIATIONS
RAIN
RUBBERS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
ULTRAVIOLET RADIATION
WOOD