Characteristics of interfacial wettability and adhesiveness between ammonium perchlorate and azide-polyether

In order to improve the interfacial wettability and adhesiveness between matrix and filler in the preparation process of azide-polyether based solid propellant and the processing property of the slurry, the effects of the kind of bonding agents and plasticizers and the ratio of plasticizers on the binding energy of 3, 3-diazide methyl epoxy butane and tetrahydrofuran copolymer (PBT) based matrix and ammonium perchlorate (AP) were calculated by using molecular dynamics calculation method. Three main crystal planes (011)/(201)/(210) of AP were considered. The results show that the rational plasticizers, plasticizer ratios and bonding agents can effectively improve the interface wetting characteristics of ammonium perchlorate and azide-polyether based solid propellants.The binding energy between ammonium perchlorate and PBT matrix system was the highest when dibutyl phthalate (DBP) is used as plasticizer, BUNE is used as bonding agent, and the plasticizer ratio is 0.6. The experimental results of contact angle were used to verify the calculation results. The main factors affecting the characteristics of the interfacial wettability between ammonium perchlorate and azide-polyether in solid propellant slurry were obtained, providing a guidance for improving the interface wettability and adhesiveness, and also the processing property of propellants.