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http://dx.doi.org/10.6108/KSPE.2020.24.6.101

The Study of Curing Day Reduction by Step Curing of HTPB/AP Propellant  

Kim, Kahee (Propulsion Center, Hanwha Corporation)
Park, Jung-Ho (Propulsion Center, Hanwha Corporation)
Choi, Sunghan (Propulsion Center, Hanwha Corporation)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.24, no.6, 2020 , pp. 101-107 More about this Journal
Abstract
In this paper, step-curing, which includes the change of curing temperature on the curing process, was applied to reduce curing day of HTPB/AP based propellant. This study targets the improvement of productivity of HTPB/AP based solid rocket motor. Comparison of mechanical properties of propellant resulted in the change of normal curing condition (60℃, 5 days) to step-curing condition (60℃, 1 day / 65℃, 3 days). Post-cure test was conducted to determine the impact on the shelf life of the solid rocket motor. The aging characteristics of propellants were analyzed by measuring mechanical properties and thermal expansion factor. To step-cured propellant, accelerated aging test was performed for 12 weeks, followed by tensile test. Sm(bar) and Em(%) were higher than 8 bar and 40% each, showing excellent mechanical properties.
Keywords
HTPB Propellant; Composite Solid Propellant; Step Curing; Post-cure; Accelerated Aging;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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