| 摘要 |
A rocket fuel block consists of (a) a cellular matrix composed of at least one polyamide fuel solid at 20-25 DEG C. and (b) a nitrogencontaining base non-gaseous at 20-25 DEG C. filling the cells, (a) and (b) being miscible at elevated temperatures, but not at 20-25 DEG C. The block may contain 10-30% polyamide, 70-90% nitrogen material in component (b) and 10-30% additional material. Polyamides specified are condensates of hexamethylene diamine with adipic acid and sebacic acid and copolymers of these with e -aminocaproic acid. Component (b) may be liquid, viscous, gel or solid and may be an amine, e.g. o-, m- or p-toluidine, assym.-orthoxylidine, o-, m- or p-phenylene diamine, p-anisidine, pyridine, 2-aminopyridine, m-tolylene diamine, diethylene triamine, or phenyl hydrazine. The latter may contain up to 0.5% water. A plasticizer, e.g. glycerol, may be added to provide a surface coating. Other additives may be Al, Zr, Mg, Be or Li powder, LiNH2, LiH, and thickening agents, e.g. isocyanates, with or without hexamethylene diamine, urea or benzoguanamine.ALSO:A fuel block consists of (a) a cellular matrix composed of at least one polyamide fuel solid at 20-25 DEG C. and (b) a nitrogen base, non-gaseous at 20-25 DEG C. filling the cells (a) and (b) being miscible at elevated temperature but not at 20-25 DEG C. The block may contain 10-30% polyamide, 70-90% nitrogen containing material in component (b) and 10-30% additional materials. The block may be made by mixing the reactants at 140-200 DEG C. and allowing them to cool in a mould. The two major components may be mixed first and other material added later. Polyamides specified are condensates of hexamethylene diamine with adipic acid and sebacic acid and copolymers of these with e -aminocaproic acid. Component (b) may be liquid, viscous, gel or solid and may be an amine, e.g. o-, m- or p-toluidine, asymmetric orthoxylidine, o-, m- or p-phenylene diamine, p-anisidine, pyridine, 2-aminopyridine, m-toluene diamine, diethylene triamine or phenyl hydrazine. The latter may contain up to 0.5% water. A plasticizer, e.g. glycerol may be added. Cellulose acetate may be added to provide a surface coating. Other additives may be Al, Zr, Mg, Be or Li powder, LiNH2, LiH and thickening agents, e.g. isocyanates with or without hexamethylene diamine, urea or benzoguanamine. |
