DEVELOPMENT OF THE TYPE SY-116 PHOTOCHROMIC GOGGLE SYSTEM FOR NUCLEAR FLASH PROTECTION. VOLUME I. RESEARCH ON PHOTOCHROMIC COMPOUNDS FOR FLASHBLINDNESS PROTECTION.
Abstract
Photochromic compounds were synthesized and evaluated with the objective of exploring new materials which would improve the characteristics of the E G and G goggle. Evaluation of broad-band-absorbing DIPS and XNIPS showed that they gave densities which were too low to be useful in protective goggle systems. A study of solvent effects on spiropyrans demonstrated that (1) absorption of short-wavelength ultraviolet light by the solvent does not decrease the performance of the spiropyran and (2) the solvent effect cannot be used to control spiropyran fading rates because of a decrease in density which accompanies an increased fading rate. The initial results obtained with the study of triarylmethane compounds suggests that they will provide better photochromic characteristics in a goggle than the spiropyran solution used in the present E G and G goggle. The studies demonstrated the flexibility in absorption maximum and fading rate which can be achieved with these materials. Mixed filter solutions were prepared from the triarylmethanes which have broad visible absorption and high luminous densities. The synthesis of new materials was simplified by the use of linear free energy relationships to predict the final properties of the product. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1965
- Accession Number
- AD0833316
Entities
Organizations
- Arthur D. Little