Accession Number : ADA117158

Title :   Laser Induced Polymerization Reactions in Solid Propellant Binders.

Descriptive Note : Conference paper,


Personal Author(s) : Ayers,O E ; Allan,B D ; Melvin,W S ; Murfree,J A ; Wharton,W W

PDF Url : ADA117158

Report Date : 18 Jun 1982

Pagination or Media Count : 14

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.

Descriptors :   *Laser beams, *Polymerization, *Reaction kinetics, *Polyurethane resins, Absorption, Isocyanates, Solid rocket propellant binders, Organometallic compounds, Processing, Catalysts, Radiation, Photochemical reactions

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE