INVESTIGATION OF THE MECHANISM OF SOLID PROPELLANT BURN RATE
Abstract
The mechanism by which iron compounds catalyze the burning rate of solid composite propellants is reported. A series of experiments were conducted to define the efficacy of iron compounds on burning rate. Experiments performed under Phases I and II studies, which were designed to study the interaction, if any, between catalysts and oxidizer and binder indicate the following conclusions. Thermal decomposition of ammonium perchlorate under pressure occurs in a single-phase step instead of the three phases observed at atmospheric pressure. The singe-phase decomposition step of ammonium perchlorate is shifted to lower temperature in the presence of iron oxide. The degree of this shift is dependent upon Fe2O3 concentration. The autoignition temperature of composite propellant decreases with increasing pressure. The rate of decomposition of anhydrous perchloric acid on varied surfaces seems to be a strong function of exposed specific surface of the catalyst and not overly dependent upon the chemical nature of the material. Iron compounds such as Fe2O3, ferrocene and butyl ferrocene do not facilitate the pyrolysis of polybutadiene polymers or gumstocks. A mechanism for catalysis by iron compounds is presented and mathematical expressions relating the variables involved have been formulated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1967
- Accession Number
- AD0379516
Entities
People
- David A. Flanigan