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http://dx.doi.org/10.6108/KSPE.2019.23.1.079

The Analysis on the Effects of Hygrothermal Aging to THPP Using DSC and XPS  

Oh, Juyoung (Department of Mechanical and Aerospace Engineering, Seoul National University)
Kim, Yoocheon (Department of Mechanical and Aerospace Engineering, Seoul National University)
Yoh, Jai-ick (Department of Mechanical and Aerospace Engineering, Seoul National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.23, no.1, 2019 , pp. 79-92 More about this Journal
Abstract
Titanium hydride potassium perchlorate (THPP) is one of the commonly utilized pyrotechnic materials in aerospace industries. The current study elucidates the effects of hygrothermal aging on the combustion of THPP experimentally. First, applying the Differential Scanning Calorimetry (DSC) and isocoversional method, both the delay of reaction start and decrease in maximum reaction rate were observed. The kinetics parameters tended to fluctuate depending the thermal reaction or intermediate product formation of THPP. Also, the oxidants decomposition and fuel oxidation phenomenon were discovered by X-ray photoelectron spectroscopy (XPS). The experimental heat from DSC data were verified as reasonable by comparing with the theoretical heat obtained utilizing both THPP formulation from XPS and NASA Chemical Equilibrium with Applications (CEA). Both data had identical variation trend, which expecially had the highest heat value at 10 weeks aged sample.
Keywords
Hygrothermal aging; Differential Scanning Calorimetry; Aging prediction; Titanium hydride potassium perchlorate(THPP);
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