Accession Number : ADA309406

Title :   An Investigation of the Ageing Characteristics of FALANT Filters.

Descriptive Note : Final technical rept.,

Corporate Author : NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV NEW LONDON CT NEW LONDON DETACHMENT

Personal Author(s) : Kavarnos, George J.

PDF Url : ADA309406

Report Date : 17 APR 1996

Pagination or Media Count : 45

Abstract : Filters used in the FALANT testing protocol were exposed to three environmental conditions: (1) incubation at 38 deg C for 34 days; (2) incubation at 75% relative humidity for 34 days; and (3) continuous exposure to visible light radiation for several days. Infrared and visible spectra of the filters were obtained before and after the incubation periods. Inspection of these spectra reveals only minor changes in the polymers used to embed the dyes. In all cases, the spectral transmission features of the plastic filters did not change during the incubation periods. Filters used in the FALANT testing protocol were exposed to three environmental conditions: (1) incubation at 38 deg C for 34 days; (2) incubation at 75% relative humidity for 34 days; and (3) continuous exposure to visible light radiation for several days. Infrared and visible spectra of the filters were obtained before and after the incubation periods. Inspection of these spectra reveals only minor changes in the polymers used to embed the dyes. In all cases, the spectral transmission features of the plastic filters did not change during the incubation periods.

Descriptors :   *INFRARED SPECTROSCOPY, *ULTRAVIOLET SPECTROSCOPY, *COLORS, *FILTERS, *PLASTICS, *MELTING POINT, *INFRARED FILTERS, EXPOSURE(GENERAL), POLYMERS, RED(COLOR), LIGHT, TRANSMITTANCE, SPECTRA, HEATING, VISIBLE SPECTRA, INCUBATION, DYES, POLYCARBONATES, INORGANIC POLYMERS.

Subject Categories : Plastics
      Atomic and Molecular Physics and Spectroscopy
      Optics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE