Accession Number:

ADA263252

Title:

Thermal Control Paints on LDEF: Results of M0003 Sub-Experiment 18

Descriptive Note:

Technical rept.

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA MECHANICSAND MATERIALS TECHNOLOGY CENTER

Report Date:

1993-01-15

Pagination or Media Count:

28.0

Abstract:

Several thermal control paints were flown on LDEF, including the white paints Chemglaze A276, S13GLO, and YB-71, and the black paint D-111. The effects of low earth orbit, which include those induced by UV radiation and atomic oxygen, varied significantly with each paint and its location on LDEF. For example, samples of Chemglaze A276 located on the trailing edge of LDEF darkened significantly due to UV-induced degradation of the paints binder, while leading-edge samples remained white but exhibited severe atomic oxygen erosion of the binder. Although the response of S13GLO to low earth orbit is much more complicated, it also exhibited greater darkening on trailing edge- samples compared to leading-edge samples. In contrast, YB-71 and D-111 remained relatively stable and showed minimal degradation. This report examines the performance of these paints as determined by changes in their optical and physical properties, including solar absorptance as well as surface chemical changes and changes in surface morphology. It also correlates of these optical and physical property changes to the physical phenomena that occurred in these materials during the LDEF mission.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Thermodynamics
  • Unmanned Spacecraft
  • Manned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE