Accession Number : ADA307677

Title :   Effect of Ultraviolet Irradiation on Selected Plastic Films in Vacuum.

Descriptive Note : Technical memo.,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Anagnostou, Evelyn

PDF Url : ADA307677

Report Date : JUL 1965

Pagination or Media Count : 18

Abstract : Selected plastic films which had possible application as encapsulants for thin-film cadmium sulfide solar cells were irradiated in vacuum by ultraviolet light below 3000 angstroms for various lengths of time up to 5266 hours. The light intensity was between 0.67 and 1 times the integrated solar intensity below 3000 angstroms at 1 astronomical unit. The change in optical trans-mission with irradiation time was measured from 0.35 to 2.7 microns, and changes in percent elongation and breaking strength were measured at room temperature. Of the films tested, the most resistant to damage was H-film, a polyimide, and weather-durable Mylar was the next most resistant.

Descriptors :   *ULTRAVIOLET RADIATION, *VACUUM, *FILMS, *IRRADIATION, *PLASTICS, DAMAGE, RESISTANCE, INTENSITY, LIGHT, ROOM TEMPERATURE, ELONGATION, POLYIMIDE RESINS.

Subject Categories : Plastics
      Polymer Chemistry
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE