Preparation of bonding type phase change material and its desensitization coating effect on fine grained AP study

DOI:	10.11809/bqzbgcxb2023.09.012
Keywords:	ammonium perchlorate; mechanical sensitivity; bonding; phase change; coating
Abstract:	With the continuous improvement of safety requirements for missile weapons, it is urgent to reduce the mechanical sensitivity of fine ammonium perchlorate (AP) and its energetic materials, which is one of the key problems that must be solved to develop high performance and low harm solid propellants. However, most of the existing desensitized coatings have insufficient interaction with the AP interface, and the coating are easy to fall off, which leads to poor desensitization effect. In order to solve these problems, this article selects tetratriacontane with a phase change unit as the main chain, and introduces pentaerythritol tris (3 aziridin 1 ylpropionate (PTAP) with a bonding unit to further improve interface interaction, thus preparing a bonding type phase change material (Tetratriacontane HDI PTAP, THP). The results show that: compared with the paraffin based phase change material/AP interface, the interfacial tension of the THP/AP interface is reduced by about 50%, and the adhesion work is increased by about 100%, showing strong interface characteristics. After surface is coated with THP, the impact sensitivity of AP decreases from 92%~96% to 0~8%, and the friction sensitivity decreases from 96%~100% to 0~12%, showing remarkable low sensitivity and excellent safety performance.
Published:	2023-09-28
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