Preparation and Properties of Spherical CL-20 Composites br

Micrometer-sized spherical composites based on 2,4,6,8,10,12-hexanitrohexaazaisowurtzitane (CL-20) with fluoror-ubber (F2604), dioctyl sebacate (DOS), and polyvinyl butyral (PVB) were prepared by an electrospray method. After preparation, the morphology, chemical bonds, thermal decom-position properties, mechanical sensitivity, and explosion perform-ance were characterized. The main explosive CL-20 transformed from epsilon-CL-20 to beta-CL-20 after electrospray preparation. With an insensitive additive mass ratio of 5 wt %, the CL-20/F2604 composite had the highest maximum peak exothermic temperature and the lowest mechanical sensitivity. The explosion pressures of the composites with the same mass ratio of additives decreased in the order CL-20/F2604 > CL-20/PVB > CL-20/DOS and were lower than that of raw CL-20.

Automated summary

Micrometer-sized spherical composites based on CL-20 with F2604 as an insensitive additive exhibit high maximum peak exothermic temperature and low mechanical sensitivity, resulting in varied explosion pressures.