Accession Number:

ADB014104

Title:

Investigation of Contamination Effects on Thermal Control Materials

Descriptive Note:

Final technical rept. 15 May 1974-14 Aug 1975

Corporate Author:

MCDONNELL DOUGLAS ASTRONAUTICS CO ST LOUIS MO

Report Date:

1976-03-01

Pagination or Media Count:

86.0

Abstract:

Contamination kinetics studied on thick films from DC-704 and RTV-602 commercial grade using both infrared ellipsometry and quartz crystal microbalances, confirmed that monomers experience constant deposition rates and reevaporation rates, while polymers have an exponential decay in such areas. Kinetics data was also obtained on a purified form of RTV-602 which showed significantly lower outgassing rates, and on SR-585 silicone adhesive. Limited data was also obtained for RTVs -106 and -560. Measurements were made to obtain effective molecular weight data on outgassing species and their vapor pressure. However, the molecular weight data was not considered reliable due to its wide scatter. The effects of specific contaminants, such as multilayer insulations, a non-reflective black paint, and a bonded silica fabric, was determined on critical properties of different substrates.

Subject Categories:

  • Coatings, Colorants and Finishes
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE