Compatibility of Dodecahydrododecaborate with Propellants Ingredients

The physical properties of three kinds of dodecahydrododecaborates, dipotassium dodecahydrododecaborate (BH-1), bis(N-methylurotropinium) dodecahydrododecaborate (BH-2), bis(triaminoguanidinium) dodecahydrododecaborate (BH-3), were studied by sensitivity test instrument, density analyzer and thermogravimetric analysis, and the compatibility of three kinds of dodecahydrododecaborates with four kinds of common propellant components (binders, curing agents, plasticizers and high energy fillers) was systematically investigated by DSC. The results show that the densities of three kinds of dodecahydrododecaborates are 1.2g/cm³ and they are insensitive to impact and friction. Under 500℃, three kinds of dodecahydrododecaborates have good compatibility with the binders (HTPB and PET), curing agents (N-100 and TDI), plasticizers (DOS and A3), but compared with individal compounds, the decomposition peak temperature of binary mixtures of dodecahydrododecaborates and RDX decreases by 12.7-37.5℃, leading to earlier decomposition of RDX and sample, while BH-2 and BH-3 have poor compatibility with AP, they are not suitable for use in such propellants.