Accession Number : ADA019108

Title :   Evaluation of Additives to Reduce Solid Propellant Flammability in Ambient Air.

Descriptive Note : Technical rept. 1 Dec 71-30 Nov 74,

Corporate Author : PRINCETON UNIV N J

Personal Author(s) : Caveny,Leonard H. ; Mackiewicz,Anthony Z. ; Summerfield,Martin

Report Date : DEC 1975

Pagination or Media Count : 91

Abstract : An experimental investigation to obtain an understanding of how chemical additives (i.e., flame inhibitors, char formers, and coolants) intended to reduce the likelihood of accidental ignition and flammability affect the combustion of high energy propellants in ambient air. Several composite propellants were made more resistant to ignition. However, test results for high energy propellants revealed that (once ignition occurred) the continual resupply of reactants (both air and propellant products) overwhelms the contributions of the additives and prevents self-extinguishment in ambient air. In some cases elimination of the conventional external flame resulted in smoldering which produced extremely hazardous, explosive gases. Several of the moderately high energy nitramine composite propellants with high decomposition temperature binders are several times more resistant to accidental ignition than conventional propellants and are easily extinguished, if ignited.

Descriptors :   *Composite propellants, *Solid rocket propellants, *Flammability, Fire extinguishing agents, Additives, Ignition, Fire safety, Combustion, Burning rate, Coolants, Halogenated hydrocarbons, Phosphorus, Ammonium perchlorate, Nitrocellulose, HMX, Organometallic compounds

Subject Categories : Combustion and Ignition
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE