Laser Induced Polymerization Reactions in Solid Propellant Binders.
Abstract
These studies indicate significant enhancement of the polymerization rate of organometallic catalyzed polyol-isocyanate reactions can be obtained with a Nd:YAG ultraviolet/visible laser. This enhancement is wavelength and catalyst dependent. While the precise mechanism is not known, the photorate enhancement appears to be dependent on the formation of an activated metal-isocyanate complex. With the exception of dibutyltin diacetate, the only additives which gave enhanced photochemical activity at 266, 355, and 532 nm were those organometallic compounds containing iron as the central metal atom. However, not all the iron compounds screened showed photoenhancement under the conditions of the experiments. These investigations indicate the laser can be used to enhance and control urethane formation reaction rates and opens the possibility that, through proper wavelength selection, other compounds may act as photocatalysts in these or other types of reactions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 18, 1982
- Accession Number
- ADA117158
Entities
People
- B. D. Allan
- J. A. Murfree
- O. E. Ayers
- W. S. Melvin
- W. W. Wharton
Organizations
- United States Army Aviation and Missile Command