Seminar: High Explosives, Detonation and Gels as Energy Dissipation Media for Energetic Materials Desensitization

11/04/2018 - 11:00 - 13:00
Abstract: 

What are high explosives? What is the detonation process and can we prevent full detonation of high explosives? 

The hypothesis that gels, which have a variety of dissipation mechanisms in response to external forces can provide efficient energy deflection media protecting sensitive energetic materials from accidental initiation is explored. Entrapment of explosives, with an emphasis on peroxide materials, in gels is demonstrated as a general method to substantially lower explosives sensitivity diverting stimuli from the sensitive materials to the gel. Friction is a more difficult stimulus to dissipate in comparison to impact. The desensitization method developed, is with minimal material manipulations. Practical considerations as mode of application, solubility, and controlling speed of gelation determine that the method of choice is a sol‐gel process using a mixture of three alkylalkoxysilanes, RnSi(OR′)4–n, producing a hybrid organic‐inorganic gel enabling complete triacetone triperoxide (TATP) desensitization at 20–25 % v/v concentrations.

 

Teacher: 
Dr. Amir Weitz R&D manager at the Chemistry and Materials group RAFAEL
Location: 
Building 211, seminar room