Ammonium perchlorate (AP)/Cu(OH)(2) core-shell nanocomposites were successfully synthesized using a facile ultrasonic assisted-coprecipitation synthesis route. The obtained AP/Cu(OH)(2) nanocomposites were characterized by means of powder X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Its thermal decomposition was studied under the non-isothermal conditions with thermogravimetric analysis and differential scanning calorimeter (TG-DSC) techniques. In this procedure, SEM and TEM observations revealed that Cu(OH)(2) nanoparticles with an average size of 10-15 nm were uniformly deposited on the surface of AP particles. Detailed characterization results indicated that the existence of evidence of Cu(OH)(2). As expected, it was found that the AP/Cu(OH)(2) nanocomposites with mass fraction of 2 wt% Cu(OH)(2) remarkably decreased the peak temperature of high temperature decomposition of AP by 80.2 8 degrees C from approximately 441.3 8 degrees C to 361.1 8 degrees C. As compared with pure AP, the AP/Cu(OH)(2) nanocomposites show lower impact and friction sensitivity. These results may lead to potential applications of the AP/Cu(OH)(2) nanocomposites in the composite solid propellants for accelerating the thermal decomposition of AP.