Interfacial interaction between hyperbranched macromolecular bonding agent and RDX

Interfacial interaction between hyperbranched macromolecular bonding agents (HPMs) and solid filler RDX were studied via the contact angle method. The influence of the bonding agents on mechanical property of HTPB/RDX propellant was also investigated, compared with commonly-used micromolecular bonding agents of T-313 and HX-752. The results suggested that HPMs had better adhesion and wettability with RDX than T-313 or HX-752. Furthermore, the interface formed between HPMs and RDX were more stable in the binder HTPB. HPMs significantly improved both the tensile strength and the elongation of HTPB/RDX propellant in comparison with T-313 and HX-752, and HTPB/RDX propellant with addition of HPM2 exhibited best mechanical property, which were consistent with the results of the interfacial property measurement.