Study on epsilon-CL-20 Coated with a Wax/F-2311 Double-Layer Composite Structure

In order to reduce the mechanical sensitivity of epsilon-CL-20, wax and fluororubber polymers were used as coating materials and desensitizers to coat epsilon-CL-20 by the water suspension method. Through molecular dynamics calculations, fluorine rubber F-2311, which had a good combination with epsilon-CL-20, was selected as the coating material and then epsilon-CL-20-based composite particles with double-layer structure were prepared. The contact angles of water, glycerin and diiodomethane as the testing liquids on the surface of F-2311 and wax were measured by a contact angle measuring instrument, and the thermodynamic parameters of epsilon-CL-20/F-2311 and the epsilon-CL-20/wax interface were calculated. epsilon-CL-20 before and after coating was characterized by scanning electron microscopy (SEM), X-ray diffractometry (XRD), differential scanning calorimetry (DSC), and the mechanical sensitivity analytical method. The results showed that F-2311/wax had uniformly passivated on the surface of epsilon-CL-20, forming a dense and uniform protective film, and the CL-20 crystal form did not change after coating. The double-layer composite structure effectively reduces the sensitivity of epsilon-CL-20 and improves the thermal stability of epsilon-CL-20.