Improvement of Interfacial Properties Between Cis‐1,4‐polybutadiene Rubber and HMX Crystal.

The interfacial strength between explosive crystal and binder usually plays a key role in exhibiting excellent mechanical properties of composite explosives. In this paper, high energetic crystal octahydro‐1,3,5,7‐tetranitro‐1,3,5,7‐tetrazocine (HMX) was coated by the typical binder cis‐1,4‐polybutadiene rubber (BR), then two silane coupling agents were added to the composite particles to enhance the interface strength. The results showed that the BR binder modified by silane coupling agent is easier to spread on the surface of HMX crystal, and form a good coating effect. In the mechanical properties test of composite particles, (3‐Aminopropyl) trimethoxysilane significantly improved the tensile and compressive strength of HMX/BR based composite particles, while 3‐(Triethoxysilyl) propionitrile decreased the mechanical properties of the composite particles. [ABSTRACT FROM AUTHOR]