Slow Cook-Off Test and Evaluation for HTPE Insensitive Propellants

HTPE 둔감추진제 완속가열 시험평가

This study was investigated to know the thermal decomposition and measure the reaction time and temperature by EIDS cook-off test for the propellant ingredients and 2 kinds of HTPE propellants. The thermal analysis of the propellant ingredients used in this study showed that the thermal stability of these materials decreases in the following order : AP > HTPE > AN > BuNENA. In addition, propellant HTPE 002 containing AN showed that an endothermic process at around $125^{\circ}C$ corresponding to the solid`solid phase change($II{\rightarrow}I$) of AN was followed by the exothermic process due to decomposition of BuNENA/AN until $200^{\circ}C$. HTPE 001 and HTPE 001 reacted at around $250^{\circ}C$ and $152^{\circ}C$ each other, and the temperature of them sharply increased at $115^{\circ}C$ from EIDS slow cook-off tests.

본 연구에서는 Hydroxy Terminated Polyether(HTPE) 추진제 원료와 HTPE 둔감 추진제 조성 2종에 대하여 DSC와 TGA를 사용하여 열분해 특성을 고찰하였고, Extermely Insensitive Detonating Substance(EIDS) 완속가열 시험을 수행하여 반응 시간과 반응 온도를 측정하였다. AN이 포함된 HTPE 002는 약 $125^{\circ}C$에서 AN의 상전이과정($II{\rightarrow}I$)을 거친 후, 약 $200^{\circ}C$범위까지 BuNENA와 AN이 함께 발열특성을 가지고 분해됨을 알 수 있었다. EIDS 완속가열 시험을 수행한 결과 HTPE 001은 $250^{\circ}C$, HTPE 002는 $152^{\circ}C$ 부근에서 반응이 있어났으며, 두 추진제 모두 $115^{\circ}C$부근에서 급격한 온도 상승이 일어났다.