Abstract
This study investigates the thermal control management of hypersonic aircraft using endothermic hydrocarbon fuel with regenerative cooling properties. It focuses on the nitrogen-containing macroinitiator hyperbranched polyamidoamine (HPAM), modified to create an oil-soluble derivative, polyamide-amine (PPAM). Various thermal analysis methods, particularly thermogravimetric analysis (TGA), are employed to examine PPAM's thermochemical behavior during pyrolysis. The modified Avrami-Erofeyev model effectively describes PPAM's two-step thermal decomposition, showing a strong alignment between experimental and theoretical values. Additionally, TG-FTIR and py-GC/MS techniques analyze the free radical mechanisms and volatile products during pyrolysis. Results indicate that PPAM significantly enhances the thermal cracking of n-decane, increasing endothermic reactions and improving the fuel heat sink capacity. This research offers insights for optimizing endothermic hydrocarbon fuel cracking.